[were.wolf] n, pl were.wolves [ME, fr. OE werwulf (akin to OHG werwolf werewolf), fr. wer man + wulf wolf--more at virile, wolf] (bef. 12c): a person transformed into a wolf or capable of assuming a wolf's form
WEREWOLF
Meaning of WEREWOLF in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012