缬草

缬草	xié cǎo	valerian (Valeriana officinalis)
缬	xié	knot / tie a knot
草	cǎo	variant of 草
草	cǎo	grass / straw / manuscript / draft (of a document) / careless / rough / CL:棵,撮,株,根
草	cào	variant of 肏