wonted (adj.)

"accustomed," Middle English contraction of Old English wunod, past participle of wunian "to dwell, inhabit, exist; be accustomed, be used to," from Proto-Germanic *wunen "to be content, to rejoice" (source also of Old Saxon wunon, Old Frisian wonia "to dwell, remain, be used to," Old High German wonen, German wohnen "to dwell;" related to win (v.) and wean), from PIE root *wen- (1) "to desire, strive for." The original meaning of the Germanic verbs was "be content, rejoice."

"not usual," 1550s, from un- (1) "not" + wonted. Earlier (and more correctly) unwont (c. 1400).