a- or an-
without; no
ab-
away from
ad-
towards
anti-
against; to stop
dys
difficult; painful
ecto-
outisde
endo-
within; inside
exo-
outside
hyper-
above normal
hypo-
below normal
inter-
between
intra-
within
Oligo-
very little
peri-
around
poly-
many; excessive
post-
after
pre-
before
sub-
below
super-
above