Prefixes & Suffixes

Prefixes and suffixes are small word parts added to the beginning or end of a root word to change its meaning or its grammatical role. A prefix such as un- in unhappy can reverse a word's sense, while a suffix like -ness in kindness can turn an adjective into a noun. Because these additions work quietly behind the scenes, they are one of the simplest ways to build a richer vocabulary and to see how many English words are connected. Once you start noticing them, words that once looked unfamiliar often become easier to decode.

Understanding prefixes and suffixes matters because it helps you read more accurately, choose words more precisely, and speak with greater confidence. They can show whether a word is negative, plural, comparative, or related to a particular field, which makes them useful in both everyday communication and more formal writing. On this page, you can explore common patterns, check meanings, and learn how word endings and beginnings affect spelling and usage. Use it to spot familiar parts in new words, strengthen your word-building skills, and gradually make your English more natural, flexible, and exact.

337 entries in this category

Adjective Suffixes

19
-based

forms adjectives meaning founded on or using as a basis.

home-basedschool-basedscience-basedvalue-based
-ic

forms adjectives meaning relating to or having the nature of.

basicpoetichistoricdramaticheroic
-wide

forms adjectives meaning extending throughout a whole area.

nationwideworldwidecountywidecitywide
-ese

forms adjectives meaning relating to a place, language, or people.

JapaneseChineseVietnamesePortugueseSudanese
-esque

forms adjectives meaning in the style of or resembling.

picturesquestatuesquegrotesqueRomanesqueKafkaesque
-worthy

forms adjectives meaning deserving or having value for.

worthytrustworthynewsworthypraiseworthy
-free

forms adjectives meaning without or lacking.

sugar freedairy freesmoke freegluten freetax free
-proof

forms adjectives meaning resistant to or protected against.

waterprooffireproofsoundproofbombproof
-filled

forms adjectives meaning full of or packed with.

sun-filledjoy-filledcrowd-filledrain-filled
-graphical

forms adjectives meaning relating to description, mapping, or recording.

biographicalgeographicaltopographicaldemographicalcartographical
-bound

forms adjectives meaning tied or restricted to a place or condition.

homeboundwindboundroadboundbedbound
-ial

forms adjectives meaning relating to or connected with.

socialofficialfacialracialcommercial
-ridden

forms adjectives meaning badly affected by or full of.

crime-riddenguilt-riddenpain-riddenfear-ridden
-ical

forms adjectives meaning relating to or having the quality of.

logicalhistoricalpoliticalpracticalcritical
-ile

forms adjectives meaning having a particular quality or being able to.

fragilefertilesenilejuvenilevolatile
-minded

forms adjectives meaning having a specified kind of mind or attitude.

open-mindednarrow-mindedsingle-mindedbusiness-minded
-like

forms adjectives meaning similar to or resembling.

childlikelifelikedreamlikesquirrel-likelady-like
-hearted

forms adjectives meaning having a specified kind of heart or feeling.

kindheartedcoldheartedwarmheartedsofthearted
-ory

forms adjectives meaning relating to a place, process, or function.

itoryfactorysensoryvictorymandatory

Adverb Suffixes

43
-wards

Means toward a place or direction.

forwardsbackwardshomewardsinwardsupwards
-eous

Forms adjectives meaning having a certain quality or nature.

gorgeouscourteousnervoushazardousmomentous
-wise-ly

A rare form used to express manner or direction.

clockwiselycrosswiselylengthwiselysidewiselybackwisely
-mently

Not a standard suffix for many adverbs, but adverbs often end in sound patterns like this.

firmlygentlysmoothlyslowlybrightly
-ways

Means in a certain manner or direction.

anywayssidewayslengthwayscrosswaysedgeways
-lesser

Means smaller, lower, or not as important.

lesser-knownlesser-usedlesser-ratedlesser-knownslesser-prized
-wardsly

A rare form meaning in a directional way.

forwardslybackwardslyinwardslyoutwardslyupwardsly
-somehow

Used in adverbial forms that show manner, result, or choice.

somehowanyhowanywayotherwisemeanwhile
-wardly

Means in a direction or manner toward something.

forwardlybackwardlyhomewardlyinwardlyoutwardly
-day

Used in time related adverbs and expressions.

todayyesterdaytomorrowweekdayholiday
-when

Used in adverbs or adverbial words of time.

wheneverwhenthensincewhentherewhen
-side

Used in some adverbial forms meaning at or to one side.

besideinsideoutsideasidehomewardside
-ever

Adds the sense of any or every in adverbial forms.

howeverwhateverwheneverwhereverwhoever
-wise-up

A rare patterned ending suggesting direction or manner.

clockwise-uplengthwise-upcrosswise-upsidewise-upendwise-up
-hand

Used in compounds to show position or direction.

right-handleft-handsouth-handnorth-handout-hand
-how

Used in adverbs that relate to manner or degree.

howeversomehowanyhowsomehoweverhow
-eron

A rare invented-style ending used to show relation or position.

upperonloweroninneronouteronneareron
-full

Means full of or filled with, sometimes used in adverbial-like expressions.

sugarfullroomfulcupfulhandfulmouthful
-ward-ly

A directional adverbial ending meaning in a given direction.

forwardlybackwardlyupwardlydownwardlyhomewardly
-wayside

Suggests location by the side of a way or road.

roadwaysidepathwaysidetrackwaysidestreetwaysidehighwayside
-st

Shows superlative or old adverbial forms in some words.

thestbestfirstmostleast
-line

In some adverbial uses, points to a boundary or direction.

sidelineoutlinebaselinedeadlineheadline
-long

Means continuing for a certain length of time or space.

side-longheadlonglengthlongyearlongdaylong
-ce

Appears in some adverbs of time or manner.

oncetwicethricehencepence
-most

Means at the extreme point or greatest degree.

outermostuppermostforemostinmosthindmost
-ly-er

A comparative adverb pattern showing more of a quality.

earlierlatersoonerlouderharder
-most-ly

Used to express mainly, chiefly, or for the greater part.

mostlylargelychieflymainlynearly
-ther

An old directional ending meaning to or toward.

hitherthitherwhitherfurthernowher
-ever-ly

Used in words that mean at any time, in any way, or in any place.

foreverwheneverwhereverhoweverwhatever
-while

Means for a time or at the same time.

meanwhilelikewisesomewhileelsewhileawhile
-time

Links meaning to a time or occasion.

sometimesoftentimesanytimeeachtimesometime
-place

Links meaning to a place or location.

someplaceanyplaceeveryplacenowhereplaceelseplace
-where

Means in or to a place.

somewhereanywhereeverywherenowhereelsewhere
-home

Relates to home or return toward home.

homewardhomeboundhomecominghomelikeat-home
-down

Means toward a lower place or position.

downwarddownstreamdowntowndownhilldownfield
-up

Means toward a higher place or position.

upwardupstreamuptownuphillupfront
-in

Means toward the inside or within.

inwardinsideinlandincominginhouse
-out

Means toward the outside or away.

outwardoutsideoutlandoutgoingoutfront
-back

Means toward the rear or return.

backwardbacksidebackgroundbacktrackbackhand
-over

Means above, beyond, or across.

overheadoverallovernightoverseasoverboard
-under

Means below or beneath.

underwayundergroundunderfootunderarmunderneath
-about

Means around, approximately, or concerning.

aboutfaceaboutturnaboutshipaboutishaboutwise
-around

Means in a circular way, near, or approximately.

aroundaboutaroundtheclockaroundtownaroundherearoundthere

Common Prefixes

8
-phobia

means fear of something.

claustrophobiaarachnophobiahydrophobiaagoraphobia
em-

means to cause to or put into.

embarkembodyempowerembraceembed
fore-

means before in place or time.

forecastforeheadforeseeforewarnforeplay
non-

means not or without.

nonfictionnonsensenonstopnonprofitnonverbal
out-

means beyond or more than.

outgrowoutliveoutdooutnumberoutperform
pro-

means forward, before, or in favor of.

proactiveproceedproclaimprogovernmentpronoun
semi-

means half or partly.

semicirclesemifinalsemisweetsemiautomaticsemiconscious
mega-

means very large or million.

megaphonemegastoremegawattmegalopolismegabyte

Common Suffixes

16
-fy

It means to make or cause to become.

simplifyclarifypurifyterrify
-ible

Forms adjectives meaning able to be, often from Latin roots.

visiblepossibleaccessibleflexibleresponsible
-ly

Forms adverbs meaning in a certain way.

quicklyslowlyquietlybrightlysimply
-ies

It is a plural ending for many nouns ending in y.

familiesstoriesbabiescountries
-est

Forms adjectives showing the highest degree.

fastestlargestbrightestsmallesthighest
-y

Forms adjectives meaning having a quality or full of something.

sunnywindyrainymuddysleepy
-ous

Forms adjectives meaning full of or having.

famouscuriousdangerousgenerousjoyous
-en

Forms adjectives or verbs meaning made of, to become, or to make.

goldenwoodenwidenstrengthensoften
-ary

Forms nouns or adjectives meaning connected with or place of.

librarydictionaryboundarymilitarysecondary
-mentary

Forms adjectives or nouns related to addition, explanation, or basic level.

complementarycommentarydocumentaryelementaryincidental
-some

Forms adjectives meaning causing or full of.

handsometroublesomelonesomefearsometiresome
-ant

Forms adjectives or nouns meaning performing or being.

importantpleasantconstantassistantvacant
-ent

Forms adjectives or nouns meaning being or doing.

silentpatientresidentdifferentexcellent
-ify

Forms verbs meaning to make or cause to become.

simplifyclassifybeautifyamplifymodify
-ize

Forms verbs meaning to make, become, or treat as.

realizeorganizemodernizefinalizecriticize
-ionary

Forms nouns or adjectives connected with a thing, person, or action.

dictionaryrevolutionarymissionarystationaryexplanatory

Greek Roots

47
eco-

environment or home

ecologyeconomyecosystemecotourism
demo-

people or population

democracydemographicdemonstratedemography
chron-

time or timing

chronologychroniclesynchronizeanachronism
dyna-

power or force

dynamicdynamodynastydynamite
dem-

people or population

democracydemographdemonstrateepidemic
hydro-

water

hydrogenhydrologyhydroplanehydroelectric
logy

the study of

biologypsychologygeologytechnology
philo-

love or fondness

philosophyphilologyphilanderbibliophile
geo-

earth or land

geologygeographygeothermalgeometry
psych-

mind or soul

psychologypsychiatrypsychicpsychology
psycho-

mind or mental

psychologypsychicpsychopathpsychotherapy
graph-

write or record

graphicautographtelegraphbiography
aero-

air

aerobicsaeroplaneaerodynamicaerospace
hydr-

water

hydranthydrationhydrogendehydrate
aqua-

water

aquaticaquariumaqueductaquifer
cracy-

rule or government

democracybureaucracytheocracyautocracy
log-

word, study, or reason

logicbiologycatalogdialogue
cracy

rule or government

democracybureaucracytheocracyaristocracy
enter-

intestine or gut

enteritisentericenterovirusenteropathy
meter-

measure

thermometerspeedometerodometerdiameter
gram-

something written or recorded

telegramdiagramepigramprogram
photo-

light or image

photographphotosynthesisphotocopyphotogenic
logy-

study of

biologygeologyanthropologypsychology
hemo-

blood

hemoglobinhemorrhagehemostathemophilia
morph-

shape or form

morphologymetamorphosisamorphousmorphic
phon-

sound or voice

telephonemicrophonephonicssymphony
iso-

equal or same

isolateisobarisometricisotope
therm-

heat

thermometerthermostatthermalhypothermia
phobia-

fear

claustrophobiaarachnophobiaagoraphobiahydrophobia
-crat

a ruler or one who rules

democratautocrattheocratplutocrat
-graphy

the process or art of writing or recording

biographygeographyphotographycalligraphy
techno-

skill or art

technologytechniquetechniciantechno
scope-

to look or examine

telescopemicroscopeperiscopekaleidoscope
crat-

rule or power

democracytheocracybureaucracyautocrat
xeno-

foreign or strange

xenophobiaxenonxenophilexenial
path-

feeling or suffering

pathologysympathyempathypsychopath
phil-

love or fondness

philosophybibliophilephilologyanglophile
pan-

all or universal

panoramapandemicpanaceapantheon
scope

to examine or observe

stethoscopetelescopemicroscopeperiscope
syn-

together or with

synthesissynonymsynchronizesyntax
tact-

touch

contacttactiletacticianintact
theo-

god or divine

theologytheocracytheisticatheist
phobia

fear

claustrophobiaarachnophobiaagoraphobiahydrophobia
-ology

the study of

biologypsychologygeologyanthropology
-phile

one who loves or likes

bibliophileanglophileaudiophilephile
-phone

sound or voice

telephonemicrophonesaxophonexylophone
-cracy

rule or government

democracybureaucracytheocracyaristocracy

Latin Roots

13
intro-

means inward or within.

introduceintrospectintrovertintrogression
ab-

away from or off

abnormalabductabsentabsolve
ad-

toward or to

advanceadaptadmitadjoin
circum-

around

circumferencecircumnavigatecircumventcircumstance
con-

with or together

connectcombineconstructconfer
contra-

against or opposite

contradictcontraceptioncontrastcontravene
ex-

out of or from

exitexportexcludeextract
extra-

outside or beyond

extraordinaryextracurricularextraditeextrasensory
ob-

toward or against

objectobstructobviousobtain
per-

through or thoroughly

permanentperformpermeatepermit
bene-

good or well

benefitbenevolentbenedictionbenefactor
dia-

through or across

diagramdialoguediameterdiagnosis
equi-

equal

equidistantequilateralequityequivalent

Medical & Scientific Prefixes

32
bio-

means life or living things

biologybiopsybiodegradablebiography
ecto-

means outside or outer

ectodermectopicectoplasmectotherm
neur-

Means related to nerves.

neurologyneuronneuralneurosis
hetero-

means different or other

heterogeneousheterosexualheterochromiaheterotroph
cardio-

means relating to the heart

cardiologycardiogramcardiovascularcardiomegaly
sym-

Means together or with.

symmetrysymbiosissymptomsympathy
leuko-

Means white.

leukocyteleukemialeukodermleukemia
derm-

means skin or the skin layer

dermatologydermisdermatitisdermabrasion
homo-

means same or alike

homogeneoushomonymhomosexualhomologous
-emia

means a condition of the blood

anemiasepticemiahypoxemiahyperglycemia
endo-

means within or inside

endoscopyendocrineendocarditisendometrium
epi-

means upon or above

epidermisepidemicepicenterepiglottis
-osis

means a condition or abnormal process

diagnosistuberculosissclerosispsychosis
-meter

means instrument for measuring

thermometerspeedometerbarometerodometer
gastro-

means stomach or the digestive tract

gastritisgastroenterologygastropodgastrointestinal
hemi-

means half

hemispherehemiplegiahemiacetalhemistich
hyper-

means excessive or above normal

hypertensionhyperactivehyperglycemiahyperthermia
hypo-

means below or deficient

hypothermiahypoglycemiahypodermichypotension
immuno-

means related to protection against disease

immunologyimmunotherapyimmunityimmunization
neuro-

means relating to nerves or the nervous system

neurologyneuronneurotransmitterneuroscience
osteo-

means bone

osteologyosteoporosisosteopathyosteocyte
patho-

means disease or suffering

pathologypathogenpathophysiologypathogenic
supra-

means above or over

suprarenalsupraspinatussupranationalsupraorbital
thermo-

means heat or temperature

thermometerthermotherapythermodynamicsthermoregulation
-algia

means pain

neuralgiamyalgiaotalgiafibromyalgia
-ectomy

means surgical removal

appendectomymastectomytonsillectomyhysterectomy
-itis

means inflammation

arthritisbronchitishepatitistonsillitis
-logy

means the study of

biologycardiologyneurologypsychology
-oma

means a tumor or growth

carcinomamelanomalymphomamyeloma
-pathy

means disease or disorder

neuropathymyopathycardiomyopathypathy
-scope

means an instrument for viewing

microscopeendoscopetelescopestethoscope
-therapy

means treatment or healing

chemotherapyradiotherapyphysiotherapygene therapy

Negative Prefixes

11
arch-

A prefix meaning chief, extreme, or principal.

archenemyarchrivalarchvillainarchconservative
in-

means not, or into, before some words

incompleteinactiveinvisibleincorrectinsecure
im-

means not, used before some words beginning with m or p

impossibleimpoliteimmatureimproperimpatient
ir-

means not, used before some words beginning with r

irregularirresponsibleirrationalirrelevantirreplaceable
il-

means not, used before some words beginning with l

illegalillogicalilliterateillegibleillustrious
a-

means not or without, often from Greek roots

amoralasexualatypicalasymmetricalamorphous
an-

means not or without, often before vowels or h

anarchyanonymousanemiaanhydrousanesthesia
counter-

means against, opposite, or in return

counterattackcounterclockwisecounterexamplecountermeasurecounteract
mal-

means bad, wrongly, or ill

malfunctionmalnutritionmalpracticemaladjustedmalcontent
pseudo-

means false or pretend

pseudonympseudosciencepseudoexpertpseudocodepseudopregnancy
para-

means beside, beyond, or related to

paralegalparanormalparaphraseparachuteparallel

Noun Suffixes

29
-mentum

A noun ending seen in learned or formal words, often for a result or movement.

momentumrudimentincrementaffluentium
-ity

A suffix meaning a state or quality.

abilityactivitypossibilityelectricity
-nesses

Forms plural nouns meaning multiple states or qualities.

darknesseshappinessessoftnesseskindnesses
-ship

A suffix meaning a condition, skill, office, or relationship.

friendshipleadershipmembershipcitizenship
-doms

Forms plural nouns meaning states, realms, or conditions.

kingdomsfreedomsofficialdomsserfdoms
-ism

A suffix meaning a belief, movement, or practice.

socialismrealismtourismheroism
-ster

Forms nouns meaning a person connected with an activity or role.

youngstergangstergamestersongster
-age

A suffix meaning a collection, action, condition, or result.

packagevillagestorageleakage
-hoods

Forms plural nouns meaning states, periods, or groups.

childhoodsneighborhoodsbrotherhoodslikelihoods
-shipments

Forms plural nouns or abstract nouns from related actions or states.

shipmentsleadershipsfriendshipsscholarships
-ery

A suffix meaning a place, quality, or collection.

bakerybraverymachineryjewelry
-dom

A suffix meaning a state, rank, or realm.

freedomkingdomwisdomstar-dom
-hood

A suffix meaning a state, condition, or time in life.

childhoodneighborhoodlikelihoodbrotherhood
-ure

A suffix meaning an action, process, or result.

failurepleasurepressureclosure
-al

A suffix meaning an action or process, often forming nouns from verbs.

arrivalrefusalproposaldenial
-ance

A suffix meaning an act, state, or quality.

acceptanceperformanceimportanceinsurance
-ence

A suffix meaning a state, quality, or condition.

differencesilenceconfidencepresence
-cy

A suffix meaning a state, rank, or quality.

privacyaccuracyefficiencydemocracy
-ling

A suffix meaning a small, young, or associated person or thing.

ducklinghirelingearthlingunderling
-an

A suffix meaning belonging to, relating to, or being a person from a place.

Americanhumanartisanurban
-ian

A suffix meaning a person skilled in or connected with something.

musicianhistorianmagicianelectrician
-ee

A suffix meaning a person who is affected by or receives an action.

employeerefereetraineedevisee
-ar

A suffix meaning a person connected with an action or thing.

liarbeggarscholarcellar
-ess

A suffix meaning a female person or animal.

actresslionessprincesswaitress
-let

A suffix meaning a smaller version of something.

bookletstreamletpigletstarlet
-ette

A suffix meaning a small, shorter, or feminine form.

kitchenettecigarettecassettelaunderette
-ward

A suffix meaning toward a direction or position.

forwardbackwardhomewardupward
-wise

A suffix meaning in a manner, direction, or respect.

clockwiselengthwisesidewiseotherwise
-acy

A suffix meaning a state, quality, or office.

privacyaccuracydelicacyintimacy

Number Prefixes

37
prime-

means first or basic in number terms.

prime numberprime timeprime costprime factor
enn-

Means nine.

ennagramennoblingenneadenneagon
uni-

means one or single.

unicycleunicornunilateralunisonuniform
mono-

means one or single.

monologuemonotonemonochromemonopolymonorail
kil-

Means one thousand.

kilogramkilometerkilowattkiloliter
duo-

means two or double.

duoduplexduotoneduology
octo-

means eight.

octopusoctagonaloctogenarianoctosyllabic
di-

means two or double.

dioxidedioxidedilemmadichotomydioxide
septa-

means seven.

septagonseptetseptennialseptember
tetra-

means four.

tetrahedrontetrathlontetrametertetrarchytetrapod
quad-

means four.

quadrantquadrilateralquadruplequadricepsquadriplegia
penta-

means five.

pentagonpentathlonpentameterpentagrampenthouse
hexa-

means six.

hexagonhexapodhexameterhexagonalhexane
hepta-

means seven.

heptagonheptathlonheptamerheptaneheptarchy
sept-

means seven.

septetSeptemberseptupleseptennialseptuagenarian
octa-

means eight.

octagonoctopusoctaveoctetoctennial
oct-

means eight.

octupleoctaloctahedronOctoberoctogenarian
ennea-

means nine.

enneagramenneadenneahedronenneasyllableennea
nona-

means nine.

nonagonnonagenariannonarynonuplenonagon
deca-

means ten.

decagondecathlondecadedecimaldecapod
hendeca-

means eleven.

hendecagonhendecasyllablehendecahedronhendecathlonhendecane
dodeca-

means twelve.

dodecagondodecahedrondodecasyllabledodecathlondodecarchy
cent-

means one hundred or one hundredth related.

centurycentimetercentipedecentennialcentigrade
hecto-

means one hundred.

hectarehectogramhectometerhectographhectoliter
kil(o)-

means one thousand.

kilogramkilometerkilowattkilohertzkiloliter
myria-

means ten thousand or many.

myriametermyriadmyriagrammyriarchmyriapod
giga-

means billion or very large.

gigabytegigawattgigahertzgiganticgigapixel
tera-

means trillion or very large.

terabyteterawattterahertzteraflopterrestrial
peta-

means very large, often one thousand trillion.

petabytepetafloppetahertzpetalpetro
exa-

means extremely large, often one quintillion.

exabyteexafootexascaleexaflopexahertz
zetta-

means extremely large, often one sextillion.

zettabytezettascalezettaliterzettaflopzettahertz
yotta-

means extremely large, often one septillion.

yottabyteyottawattyottahertzyottameteryottascale
-teen

means the numbers thirteen through nineteen.

thirteenfourteenfifteensixteenseventeen
-ty

means a multiple of ten.

twentythirtyfortyfiftysixty
-th

means an ordinal number.

fourthfifthsixthseventheighth
-fold

means times as many or in many parts.

twofoldthreefoldtenfoldhundredfoldmanifold
-illion

means a very large number in the naming sequence.

millionbilliontrillionquadrillionquintillion

Position Prefixes

35
un-

Means not or the opposite of.

unhappyunfairunlockunknown
re-

Means again or back.

redoreturnreusereview
pre-

Means before in time or order.

previewpreheatpreventprefix
post-

Means after or later than.

postwarpostscriptpostponepostgraduate
sub-

Means under, below, or less than.

subwaysubmarinesubtitlesubzero
super-

Means above, beyond, or extra.

superstarsuperhumansupermarketsupervise
inter-

Means between or among.

internationalinteractinterviewinterstate
intra-

Means within or inside.

intramuralintravenousintracityintrastate
trans-

Means across, through, or beyond.

transporttransfertranslatetranscontinental
tele-

Means far away or at a distance.

telephonetelevisiontelegramtelecommute
micro-

Means very small.

microscopemicrochipmicrophonemicrobe
macro-

Means large or overall.

macrocosmmacroeconomicsmacrostructuremacroview
anti-

Means against or opposite.

antibioticanticlockwiseantifreezeantivirus
auto-

Means self or by itself.

autographautomaticautobiographyautopilot
bi-

Means two or twice.

bicyclebilingualbipolarbiweekly
tri-

Means three.

triangletripodtricycletrilingual
multi-

Means many.

multicolormultimediamultitaskmultinational
over-

Means too much or above.

overeatoverloadovercomeoversee
under-

Means below, less, or not enough.

undergounderpayundergroundunderstand
mis-

Means wrong or badly.

misplacemisreadmisleadmisprint
dis-

Means not, apart, or reverse.

disagreedislikedisconnectdiscover
co-

Means with or together.

cooperatecoauthorcoexistcoworker
de-

Means down, away, or reverse.

decreasedefrostdevaluedeactivate
en-

Means to cause to be or to put into.

enlargeenrichenableencircle
-ful

Means full of or having.

helpfulcarefulhopefuluseful
-less

Means without or lacking.

hopelesscarelesshomelessendless
-ness

Means state or quality of.

kindnessdarknesshappinesssadness
-tion

Means act, process, or result.

actioncreationnationeducation
-sion

Means act, state, or result.

decisionexpansiondivisionvision
-ment

Means an action, process, or result.

movementagreementpaymentdevelopment
-er

Means a person or thing that does something.

teacherrunnerworkerplayer
-or

Means a person or thing that does something.

actorvisitorcreatoradvisor
-ist

Means a person connected with a skill, belief, or activity.

artistscientistpianisttourist
-able

Means able to be or suitable for.

readablemovableportableusable
-ive

Means having the nature of or tending to.

activecreativeprotectivetalkative

Size Prefixes

13
quadri-

Means four or fourfold.

quadrilateralquadrupedquadruplequadricepsquadrant
mini-

Means very small or reduced in size.

minibikeminiseriesminiskirtminiatureminimal
-gram

A suffix meaning a written or measured amount by weight, especially in metric units.

milligramkilogramcentigramgramdecagram
kilo-

Means one thousand of a unit.

kilogramkilometerkilowattkilobytekilolitre
deka-

Means ten of a unit.

dekagramdekaliterdekameterdekaddekalitre
nano-

Means extremely small, one billionth in scale.

nanometernanosecondnanotechnologynanoworldnanogram
pico-

Means one trillionth of a unit.

picometerpicogrampicosecondpicoscalepicowatt
femto-

Means one quadrillionth of a unit.

femtosecondfemtogramfemtometerfemtolithfemtocell
atto-

Means one quintillionth of a unit.

attosecondattogramattometerattositeattofarad
zepto-

Means an extremely tiny fraction, one sextillionth of a unit.

zeptosecondzeptogramzeptometerzeptolitrezeptobase
yocto-

Means the smallest standard metric prefix, one septillionth of a unit.

yoctosecondyoctogramyoctometeryoctoliteryoctobase
poly-

Means many or much.

polygonpolyglotpolygraphpolytheismpolyester
demi-

Means half or partially.

demigoddemitassedemiurgedemilunedemiseasonal

Time Prefixes

25
ante-

Before in time.

antecedentantedateantebellumantechamber
new-

means new or recently begun.

newbornnewfanglednewcomernewlywednewmoon
old-

means old, earlier, or from a former time.

oldtimeoldschoololdfashionedoldworldoldtimer
mid-

In the middle of a time period.

middaymidweekmidtermmidair
chrono-

Related to time.

chronologychroniclechronographchronometer
early-

means happening before the usual time.

earlybirdearlymorningearlywarningearlystageearlyrelease
temp-

Related to time or duration.

temporarytemporaltempocontemporary
late-

means happening after the usual time.

latecomerlatefalllatewinterlate-nightlate bloomer
tim-

means time or relating to timing.

timelytimespantimestamptimelesstimetable
simul-

At the same time.

simultaneoussimulcastsimulatorsimulacrum
neo-

New or recent.

neonatalneologyneoclassicalneophyte
milli-

One thousandth, often used in time units.

millisecondmillimetermillilitermillivolt
deci-

One tenth, often used in time units.

deciseconddeciliterdecimatedecibel
centi-

One hundredth, often used in time units.

centisecondcentimetercentigradecentipede
paleo-

Ancient or old.

paleologypaleolithicpaleontologypaleozoic
archi-

Chief, first, or earliest.

archipelagoarchangelarchitectarchenemy
proto-

First, original, or earliest form.

prototypeprotocolprotoplasmprotohuman
ultra-

Beyond normal limits, often by time or degree.

ultravioletultrasonicultramodernultralight
retro-

Backward or to an earlier time.

retrograderetrofitretrospectretroactive
pre-emptive

Done before something else to prevent it.

preemptpreemptivepreemptionpreemptor
peri-

Around or throughout a period.

periodperimeterperiscopeperennial
subse-

Following after in time.

subsequentsubsequencesubsequentlysubsegment
later-

At a later time.

laterallylaterlatterlatest
earlier-

At an earlier time.

earlierearliestearmarkearly
amphi-

On both sides or around, sometimes implying a span of time.

amphibianamphitheateramphoraamphipod

Verb Suffixes

9
-es

Adds a plural or third person singular ending after certain sounds.

watcheswashesfixespassesmixes
-ate

forms verbs meaning to cause, make, or do.

activateseparatecelebrateterminate
-ise

A variant spelling of a suffix that often means to make or cause.

advertiseexercisesurprisepremiserecognise
-ish

forms verbs often meaning to make, cause, or perform.

finishestablishvanquishabolish
-ation

Forms a noun meaning an act, process, or result.

informationcelebrationapplicationsituationpopulation
up-

means upward or to raise.

upliftupgradeuprootupend
-ed

forms past tense or past participles of verbs.

walkedjumpedopenedpainted
-ing

forms present participles or gerunds.

walkingjumpingopeningpainting
-s

marks the third person singular present tense of verbs.

runsjumpsopenspaints

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