a-
Without
ab-
Away
ad-
Towards
af-
Towards
allo-
Other
an-
Without
ana-
Against
ante-
Before
auto-
Self
bi-
Two
Brady-
Slow
Circum-
Around
Contra-
Against
De-
Cessation
Di-
Double
Dia-
Through
Dipl-
Double
Dys-
Difficult
Ec-
Out
Echo-
Repeated sound
Ecto-
Outside
Ef-
Away
En-
Within
End-
Within