waster

Etymology 1

From Middle English wastere, waister, wastar, wastour, equivalent to waste + -er. Compare Anglo-Norman wastur, Old French gastëor.

noun

1. Someone or something that wastes; someone who squanders or spends extravagantly.
2. (dialectal) An imperfection in the wick of a candle, causing it to waste.
3. (obsolete) A destroyer or plunderer.
4. An item that is spoiled during its manufacture.
   Unless the cast was very hot indeed, the steel would refuse to ascend, and a great many wasters were caused thereby. 1895, Richard Smith-Casson, “Small Cast Steel Ingots”, in Transactions of the Iron and Steel Institute, volume 46, page 215

Etymology 2

Unknown

noun

1. (obsolete, chiefly fencing) A kind of cudgel; also, a blunt-edged sword used as a foil.
2. (obsolete, Scotland) A leister; a spear for catching fish.