Ec-, ecto-
out; outside
End/o-
in; within
Mes/o
middle
Dextr/o
right
Ab-
away from
Ad-
toward; near
Dia-
through; complete
Per-
through
Trans-
through; across
Ante-
before; forward
Pre-
before, in front of
Pro-
before, in front of
Post-
after, behind
Mon/o
one; single
Bi-
two, twice
Tri-
three
Quadri-
four
Poly-
many, much