with Solved Solutions.
ab- - Answer away from
ad- - Answer toward
ante- - Answer before, in front
circum- - Answer around
contra- - Answer opposition, against
primi- - Answer first
semi- - Answer half (partially)
hemi- - Answer half, also one-sided
ambi- - Answer both or both sides
null- - Answer none
pan- - Answer all
de- - Answer down, away from
dia- - Answer through
ecto-,exo- - Answer outside