A-, An-
Not, without
Ab-
Away from
Ad-
Toward
Ana-
Up, apart
Ante-
Before
Anti-
Against
Auto-
Self
Bi-
Two
Brady-
Slow
Cata-
Down
Con-
With, together
Contra-
Against
De-
Down, lack of
Dia-
Through, complete
Dys-
Bad, painful
Ec-
Out, outside
Endo-
Within
Epi-
Upon, on, above
Eu-
Good, normal
Ex-
Out, outside
Hemi-
Half
Hyper-
Excessive
Hypo-
Deficient
In-
Not or into, within