Where does “quacken” come from?

quacken (Middle English) comes from Middle Dutch quacken, from Old Dutch kwaken — to croak, quack.

Ancestry of “quacken”, step by step

StepLanguageWordMeaning
1Middle Dutchquackento croak, quack; to brag, boast; to croak
2Old Dutchkwakento croak, quack

Words derived from “quacken”

Every word from Old Dutch kwaken →Every word from Middle Dutch quacken →
quacken — Etymology, Origin & Word History | Etymology Explorer