A-, an-
Without or not
Ab-
Away from
Ad-
Toward
Ante-
Before, forward
Anti-
Against
Auto-
Self
Bi-
Double, two
Brady-
Slow
Circum-
Around
Contra-
Against
De-
Down, from, away from, not
Dia-
Across, through, apart
Dis-
Separation, away from
Dys-
Bad, difficult, abnormal
Ecto-
Outer, outside
En-
In, into, within
Endo-
Inner, inside
Epi-
Over, on, upon
Eryth-
Red
Ex-
Out, out of, from, away from
Hemi-
Half
Hyper-
Excessive, too much, high
Hypo-
Under, decreased, less than normal
In-
In, into, within, not