資料來源 : Webster's Revised Unabridged Dictionary (1913)

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).