wilt

Recorded since 1691, probably an alteration of welk, itself from Middle English welken, presumed from Middle Dutch (preserved in modern inchoative verwelken) or Middle Low German welken (“to wither”), cognate with Old High German irwelhen (“to become soft”).

From Middle English wilt, from Old English wilt, from Proto-West Germanic *wilt, second person singular preterite-present of Proto-West Germanic *willjan. Cognate with Dutch wilt (“wilt”, second-person singular of willen), German willt (archaic second person singular indicative of wollen).