Latin Prefix/ Greek Prefix	Meaning
a-, an-	“alpha privative”, a negative
ab-	away from
ad-	to, towards, near
ambi-	both
ana-	up, back again, throughout, against
ante-	before, in front of
anti-	against
apo-	away from
bi-/bis-	twice, double
cata-	down, across, under
circum-	around
con-	with
contra-	against
de-	down, from, away from
di-	two, twice, double
dia-	through
dis-	apart, removed
dys-	hard, difficult, bad
e-, ex- (Lat.) ec- ex- (Gk.)	out of
ecto-	outside
exo-	outside, outward
en-	in
endo-	within
epi-	on, upon
extra-	outside, beyond, in addition to
eu-	well, good, easy
hemi-	half
hyper-	over, above,
hypo-	below, under
in-	in, into, on You often see this prefix as im. Used wtih verbal roots.
in-	not; occasionally, beyond belief
infra-	below
inter-	between
intro-	within
intus-	within
meta-	with, after, beyond
non-	not
opistho-	behind
palin-	again
para-	along side of, beside
per-	through, thorough, complete
peri-	around, near
post-	after, behind
pre-	in front of, before
pro-	before, in front of
proso-	onwards, in front
re-	back, again
retro-	backward
semi-	half
sub-	under, below
super-, supra-	above, upper
syn-	with
trans-	across
ultra-	beyond