wizen (v.) Look up wizen at Dictionary.com
Old English wisnian, weosnian "to wither, dry up, waste away," from Proto-Germanic *wisnon (source also of Old Norse visna "to wither," Old High German wesanen "to dry up, shrivel, wither;" German verwesen "to decay, rot"), from PIE root *wei- (2) "to wither." Related: Wizened.