A or an
without or no
Ab
away form
Ad
towards
Anti
against
Dys
difficult/painful/bad
Eu
easy/normal/good
Endo
within or inside
Ex or exo
without, out of, outside, away from
Ecto
outside
Inter
between
Intra
within
Poly
many
Oligo
scant or little
Pre
before
Post
After
Peri
around
sub
below/under/less
Super or supra
above/beyond/excessive
pan
all
leuk/o
white
penia
deficiency, reduction of numbers
-tomy
cutting into
epi
upper
extra
outside