Prefixes

Word Part + Meaning

a-

away from; without

ab-

away from

ad-

toward

an-

without

ana-

up, back, again; apart

ante-

before

anti-

against

auto-

self

bi-

two

brady-

slow

circum-

around

dis-

apart

dys-

abnormal, difficult, painful

ecto-

outside

endo-

within

epi-

above, upon, over

ex-

external, outward

hemi-

half

hyper-

above, beyond, excessive

hypo-

below, under, deficient

in-

inward, without, not, within

intra-

within

inter-

between

macro-

large

micro-

small

mono-

one

para-

beside, near, abnormal

per-

through

peri-

around

poly-

many

post-

after

pre-

before

pro-

before

quadri-

four

semi-

partial, half

sub-

below

super-

above, beyond

supra-

above, beyond

tachy-

rapid, fast

trans-

across, through

tri-

three

uni-

one