wane
Cross references: 1. abate 1. wane \'wa-n\ vi [ME wanen, fr. OE wanian; akin to OHG wano-n to wane, OE (Xwan wanting, deficient, L vanus empty, vain 1: to decrease in size or extent : DWINDLE : as 1a: to diminish in phase or intensity - used chiefly of the moon 1b: to become less brilliant or powerful : DIM 1c: to flow out : EBB 2: to fall gradually from power, prosperity, or influence : DECLINEM 2. wane n [ME, defect, fr. OE wana; akin to OE wan deficient] 1a: the act or process of waning 1b: a period or time of waning; specif : the period from full phase of the moon to the new moon 2: a defect in lumber characterized by bark or a lack of wood at a corner o r edge
Webster's English Dictionary