The Collaborative International Dictionary
Ab- \Ab-\ ([a^]b). [Latin prep., etymologically the same as E. of, off. See Of.] A prefix in many words of Latin origin. It signifies from, away, separating, or departure, as in abduct, abstract, abscond. See A-(6). [1913 Webster] ||
Douglas Harper's Etymology Dictionary
word-forming element meaning "away, from, from off, down;" from Latin ab-, ab "off, away from," cognate with Greek apo "away from, from," Sanskrit apa "away from," Gothic af, Old English of, from PIE root *apo- (see apo-). Reduced to a- before -m-, -p-, or -v-; sometimes abs- before -c- or -t-.
Etymology 1 alt. 1 (context non-productive English) from 2 (context non-productive English) Away from; outside of. pre. 1 (context non-productive English) from 2 (context non-productive English) Away from; outside of. Etymology 2
pre. (context physics English) A unit of electromagnetic charge in the centimeter-gram-second system: the abcoulomb.
Usage examples of "ab-".
He increased his pace, calling back over his shoulder, "Get a move on, Ab- I'm in a hurry!