We’re in the home stretch now! I’m suddenly feeling revitalized! So here’s wilt!
Wilt is fairly recent in that it showed up in the late seventeenth century. Amusingly enough, it comes from another English word that we don’t have anymore, welk. No, not whelk. This welk meant wilt, so I’m pretty sure. Anyway, welk comes from the Middle Dutch/Middle Low German word welkan, which is to wither and likely related to the Old High German irwelhen, become soft. Before that we’re back to Proto Germanic, where it’s welk again (fluctuating levels of complication; that’s language for you), and even earlier, it’s the Proto Indo European welg, which means wet (no, no idea how/why that switched). There’s also another word in English that comes from welg: welkin, meaning sky, which I never heard of before. Awesome points to anyone who can use that in a sentence and not sound ridiculous.