list of the most common prefixes:

PREFIX MEANING EXAMPLES
ante- before antenatal, anteroom, antedate
anti- against, opposing antibiotic, antidepressant, antidote
circum- around circumstance, circumvent, circumnavigate
co- with co-worker, co-pilot, co-operation
de- off, down, away from devalue, defrost, derail, demotivate
dis- opposite of, not disagree, disappear, disintegrate, disapprove
em-, en- cause to, put into embrace, encode, embed, enclose, engulf
epi- upon, close to, after epicentre, episcope, epidermis
ex- former, out of ex-president, ex-boyfriend, exterminate
extra- beyond, more than extracurricular, extraordinary, extra-terrestrial
fore- before forecast, forehead, foresee, foreword, foremost
homo- same homosexual, homonuclear, homoplastic
hyper- over, above hyperactive, hyperventilate
il-, im-, in-, ir- not impossible, illegal, irresponsible, indefinite
im-, in- into insert, import, inside
infra- beneath, below infrastructure, infrared, infrasonic, infraspecific
inter-, intra- between interact, intermediate, intergalactic, intranet
macro- large macroeconomics, macromolecule
micro- small microscope, microbiology, microfilm, microwave
mid- middle midfielder, midway, midsummer
mis- wrongly misinterpret, misfire, mistake, misunderstand
mono- one, singular monotone, monobrow, monolithic
non- not, without nonsense, nonentity, nondescript
omni- all, every omnibus, omnivore, omnipotent
para- beside parachute, paramedic, paradox
post- after post-mortem, postpone, post-natal
pre- before prefix, predetermine, pre-intermediate
re- again return, rediscover, reiterate, reunite
semi- half semicircle, semi-final, semiconscious
sub- under submerge, submarine, sub-category, subtitle
super- above, over superfood, superstar, supernatural, superimpose
therm- heat thermometer, thermostat, thermodynamic
trans- across, beyond transport, transnational, transatlantic
tri- three triangle, tripod, tricycle
un- not unfinished, unfriendly, undone, unknown
uni- one unicycle, universal, unilateral, unanimous

 

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