Prefixes

anti-

against

antibiotic

bi-

two

bicycle

contra-

against

contradict

di-

two

diameter, dichotomy

dis-

apart, away from

dissatisfied, disillusion

ex

former

ex-wife

ex-, e-

go out from

exit

extra-

beyond

extraterrestrial

hyper-

extremely

hyperactive

in-, im-, il-, ir-

negative, not

incapable, impossible, illogical, irresponsible

inter-

between

interaction, intermingle

intra-

within

intracoastal

intro-

inward

introduction

macro-

large

macroeconomics

micro-

tiny, small

microscope

mis-

wrong

misuse, misinform

mono-

one

monolingual

multi-

many

multinational

neo-

new

neophyte, neonatal

non-

negative, not

non-binding

omni-

all

omnipotent

poly-

many

polyglot

post-

after

postwar

pre-

before

previous

re-

again

reply, rearrange

retro-

backwards

retroactive

semi-

half

semiannual

sub-

under

submarine, subordinate

super-

above

supersede

tri-

three

tricycle, triplets

un-

negative, not

unidentified

uni-

one

unilateral