quellerEtymologyFrom Middle English queller, quellere, quellare, from Old English cwellere; equivalent to quell + -er.queller means one who quells; one who overpowers or subdues. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounOne who quells; one who overpowers or subdues.A killer.“Jack the Giant-Queller”