late 14c. in the literal sense, past participle adjective from bewitch; figurative use from 1570s.
c.1200, biwicchen, from be- + Old English wiccian "to enchant, to practice witchcraft" (see witch). Literal at first, figurative sense of "to fascinate" is from 1520s. *Bewiccian may well have existed in Old English, but it is not attested. Related: Bewitched; bewitching; bewitchingly.