a-
without
ab-
away from
ad-
toward
ambi-
both
anti-
against
an-
without
ante-
before
auto-
self
bi-
two
brady-
slow
circum-
around
contra-
against
de-
down or remove
dia-
through or complete
dys-
bad or difficult
ecto-
outside
endo-
within
epi-
upon or above
eu-
good or normal
ex-
out of
extra-
outside
hemi-
half
hyper-
excessive
hypo-
below or deficient