List of English Prefixes

Prefix	General Meaning	Example
a(n)-	not , without	atonality , asexuality , amoral , anarchy
ab-	away	abduction , absolutism , ablution
ac-
acr(o)-	high, up	Acropolis
aden(o)-
aer(o)-	air	aeronautics , aerodrome , aeroplane , aerodynamics
agr(o)-	relating to farming	agriculture
an-
an(a)-	out of	anachronism
an(o)-
andr-	man	androgyny , androcentrism , android , androgen
anem-
Anglo-	English or British	Anglo-Irish relations, anglophile
ante-	before	antebellum
anthrop(o)-	relating to human beings	anthropology , anthropocentrism , anthropomorphic
ant(i)-	against	antidote , antibody , anticlockwise
aut(o)-	self	autonomy , autobiography , automobile , autopilot
bar(o)-	atmosphere
bathy-	deep	Bathyscape , Bathysphere
be-	completely, thoroughly; excessively; on; around; about; used to form transitive verbs
bi-	two	bicycle , bijection , bilingual , bicameralism , bisexuality
bi(o)-	life	biology , biography , biosphere , biotechnology
bibli(o)-	relating to books	bibliophilia , bibliography
blast(o)-
brady-	slow	bradycardia
brom(o)-
bronch(o)-	relating to breathing	bronchitis
cac(o)-
cardi(o)-	heart	cardiovascular
cent-, centi -	hundred or hundredth	centenary, centimeter, centipede
cephal(o)-
chrom(o)-, chromat(o)-
chron(o)-	time	chronology, chronograph
circum-	around	circumcision, circumnavigation, circumlocution, circumference
cion(o)-
co-	together	cooperative, cohabit
colpo-
com-, con-, col-, cor-	with, together	conference , connotation , context , Congress , congregation
contr(a)-, contr(o)	against, opposite	contradiction , contraception , controversy
cosm(o)-		cosmology , cosmopolitan , cosmotheism
counter-	against, opposite	counterpoint , counterweight , Counter-Reformation
crin(o)-
cry(o)-	frost , icy cold	cryogenics , cryoelectronics , cryostorage
crypt(o)-	hidden	cryptography , cryptozoology
cyt(o)-	hollow, receptacle, cell	cytoplasm , cytology
dactyl(o)-
de-	taking something away, the opposite	decentralisation , deforestation , dehydration
dec(a)-, dek(a)-	ten	decamerous
deci -	one tenth	deciliter
dem(o)-	people, nation	demographics , democracy
derm(o)-, derm(a)-, dermat-	skin	dermatology , dermatitis
di-	two , double
didact(o)-	apt at teaching
dynam(o)-	power , force	dynamic , dynamite , dynamo
dis-	reverse , opposite	dissent , discovery , disambiguation
dox(o)-	Doxology
dys-	bad, deformed, abnormal	dyspepsia , dystrophy , dysarthria
eco-	house	economy , ecology , ecosystem , ecotourism , ecotage
ecto(s)-	outside	ectoskeleton
edaph(o)-
electr(o)-	electricity	electrocution
embry(o)-	full
encephal(o)-	brain	encephalitis
end(o)-, ent(o)-
enne(a)-	nine	enneastyle
enter(o)-
eo-	dawn, early	eobacterium
ep(i)-, eph-	above	epitaxy
erg(o)-		ergonomics
erythr(o)-
erot(o)-
stom(o)-, stomat(o)-
ethn(o)-		ethnology , ethnolinguistics , ethnocentrism
eu-	good	eulogy , euthanasia , eugenics , euphemism
ex-	former	ex-wife, ex-president
ex(o)-	outside	exoskeleton
extra-	very, more than usual, outside, beyond	extra-thin, extra-special extraordinary, extraterrestrial
flor(i)-	relating to flowers	florist
fore-	before, in advance	foreskin , foreshadowing
gyn-	female	gynaecology , gynoid
hemi-	half	hemimetabolous
hex(a)-	six	hexapod
hyper-	excessive, (least to greatest in order: hypo, sub, super, hyper)	hyperactive , hyperthyroidism
hyp(o)-	below, (least to greatest in order: hypo, sub, super, hyper)	hypodermic
in-	extremely	inflammable , invaluable
in-, il-, im-, ir-	not	infallibility , illiteracy , immoral , irrelevant
inter-	between, from one to another	intervention , international
intra-	within, interior	intramural, intravenous
kilo -	thousand	kilogram , kilowatt
mal-	bad, badly	malpractice , malnutrition
maxi-	most, very, large	maxi-dress
mega -, megal-	million , very large	megabyte , megaphone
meta-	after, beyond	metacarpal , metaphysics
micro -	one millionth, very small	microgram , microorganism , micronation
mid-	in the middle of	mid-term elections , Mid-Autumn Festival , Mid-Atlantic Ridge
milli -	thousandth	milligram , milliliter
mini-	small	miniskirt , miniscule
mis-	bad , wrong	miscarriage , misanthropy , misogyny
mon(o)-	one , single	monolith , monorail , monotony , monocle
multi-	many	multiculturalism , multilingual
non-	not	nonsense, non-denial denial
non-	nine	none, nonagon
oct(o)-, oct(a)-	eight	octane , octopod , octagon
oo- (" oo -oh")	egg, ovum	oocyte
out-	more, to  a  greater degree	to outdo, to outrun
over-	more than normal, too much	overpopulation , over-consumption
pent(a)-	five	pentagon
post-	after	Post-Fordism , postpartum depression , postmodernity , postmodernism
pre-	before	prediction , preview , precedent , prenatal care
pro-	for, in favour of	pro-choice, pro-life, promotion
quadr-, quart-	four	quadrangle , quadruplet , quartic , quartile
quin(que)-	five , into five parts	quinquesection
quint(i)-	fifth , five	quintiped
re-	again, repeatedly	reduction , reflection , revolution
rect(i)-	proper, straight	rectify, rectangle
scler(o)-	hard	scleroderma atherosclerosis
semi-	half	semi-automatic , semi-detached
sept(a)-	seven	heptachord
sex(i)-	six	sexivalent
Sino-	Chinese	Sino-American relations
spasm(o)-
sperm(o)-, spermat(o)-
spher(o)-
sphygm(o)-	pulso	sphygmomanometer
splen(o)-
splanchn(o)-
schiz(o)-, schist(o)-	split	schizophrenia , schistocyte
staphyl(o)-
styl(o)-	pillar
sub-	below, less than, under,(least to greatest in order: hypo, sub, super, hyper)	subset , subsonic , subway , subtitles
super-	extremely, more than, (least to greatest in order: hypo, sub, super, hyper)	superhuman , Superego , supersonic
syn-	along with, together, at the same time	synergy , synchronicity
tach(y)-, tach(o)-	fast, speed	tachycardia , tachometer
tel(e)-, tel(o)-	far, over  a  long distance	telecommunications , television , telephoto lens , telodynamic
tel(o)-, tel(e)-	end, complete, mature	teloblast
trans-	across, beyond	transfer , transubstantiation , transatlantic , Trans-Siberian railway
tri-	three	triangle , tricolor , triptych
ultra-	extremely, beyond  a  certain limit	Ultramontanism , ultraviolet
un-	not, opposite, take something away	unconstitutional , undelete
uni-	one , single	uniform , unification
ur-	first, original	urtext
zoo- (" zoo -oh")	relating to animals	zoomorphic , zoology