wilt (v.)
1690s, "to fade, droop, wither," probably an alteration of welk "to wilt," probably from Middle Dutch or Middle Low German welken "to wither," cognate with Old High German irwelhen "become soft," from Proto-Germanic *welk-, from PIE root *welg- "wet" (see welkin). Transitive sense of "cause to fade or droop" is from 1809. Related: Wilted; wilting.