Prefixes Roots and List of English Prefixes with examples




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

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