pre fixes med term

a, an (an before a vowel or h)

not, without, lacking, deficient

ambi

both

amphi, ampho

on both sides, around, both

ana, an

up, back, against, throughout

anti, ant (before a vowel or h)

against, opposed to, preventing, relieving

apo, ap, aph

away from

bi (bin, bis)

two, twice, double, both

cata (cat: before a vowel or h), cath

downward; disordered

di

two

dia (di: before a vowel)

through, across, apart

dis

apart, away

dys

difficult, painful, defective, abnormal

e, ec, ex: (before a vowel)

out of, away from

ecto (ect: often before a vowel)

outside of

en (em before b, m, and p)

in, into, within

endo, ento (end, ent: before a vowel)

within

epi (ep: before a vowel or h)

upon, over, above

eso

within, inner, inward

eu

good, normal, healthy

exo

outside, from the outside, toward the outside

hemi

half, partial; (often) one side of the body

hyper

over, above, excessive, beyond normal

hypo, hyp: (before a vowel or h), hyph

under, deficient, below normal

inter

between

meta, met: (before a vowel or h), meth

change, transformation, after, behind

para, par (before a vowel)

alongside, beside, abnormal, beyond

peri

around, surrounding

re

back, again

syn

together, with, joined

trans

across, through

con-

together, with; thoroughly, very

super- (often supra-)

over, above; excess