Medical Terminology Common Prefixes

a- ; an-

not ; without

ante-

before ; in front of (describing time or physical location in a body)

anti-

against

auto-

self

brady-

slow

dys-

painful ; difficult

endo-

within

epi-

upon ; above

hyper-

above normal

hypo-

below normal

inter-

between

intra-

within ; into

macro-

large

micro-

small

para-

near ; beside

per-

around

pseudo-

false

post-

after ; following

pre-

before ; in front of

sub-

below ; under

supra-

above

tachy-

fast

trans-

through ; across

ultra-

excessive ; beyond