/ ˈweəwʊlf; NAmE ˈwerw-/ noun
( pl. -wolves / -wʊlvz; NAmE /) (in stories) a person who sometimes changes into a wolf , especially at the time of the full moon
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WORD ORIGIN
late Old English werewulf ; the first element has usually been identified with Old English wer man . In modern use the word has been revived through folklore studies.