wane: [OE] Wane and Norwegian vana ‘spoil, waste’ are the only survivors of a family of Germanic verbs that goes back to a prehistoric *wanōjan. This was derived from the base *wan- ‘lacking’, which also produced English want. The related but now defunct English adjective wane ‘lacking’ is represented in the first syllable of wanton. => want, wanton[wane etymology, wane origin, 英语词源]