Summary: Prefixes are key morphemes in English vocabulary that begin words. The English prefix *ab-*, which means "away," appears in many English vocabulary words, such as [*ab*]sent, [*ab*]duct, and [*ab*]solute." You can remember that the prefix *ab-* means "away" via the word [*ab*]sent, for someone who is [*ab*]sent is "away" from a place, such as school or work.
