Medical Terms - Prefixes

a- an-

no, not

aut-

self

dys-

bad/painful/abnomal

trans

across/through

exo-

outside

anti-

against

ana-

up/against

ad-

toward/near

bi-

two/both

brady-

slow

ab-

away from

a-, an-

no/not/without

ante-

before/forward

con-

with/together

dia-

complete/through

ec-

out/outside

epi-

above/upon

hemi-

half

hyper-

excessive/too much/above

hypo-

difficult/too little/below

endo-

within/in/inner

ex-

out

extra-

outside of

in-

in/into

pro-

before/forward

quadri-

four

sub-

under/less than

uni-

one

re-

back/behind

pros-

before/forward

retro-

back/behind

syn-

with/together

ultra-

beyond

tri-

three

intra-

within

mal-

bad

para-

along the side of/beside

peri-

surrounding

poly-

many/much

inter-

between

meta

change/beyond

neo-

new

post-

after/behind

pre-

before

dys

bad

trachy-

fast