the world > animals > birds > freshwater birds > order Anseriformes (geese, etc.) > subfamily Merginae (duck) > [verb (intransitive)] > quack (5)
intransitive. Of a duck, goose, etc.: to quack. Also in extended use.
intransitive. Of a duck: to make its characteristic harsh sound. Also transitive with cognate object.
transitive and intransitive. To choke (a person).
intransitive. = quack, v.1
intransitive. Of a bird or animal: to utter a harsh croaking or honking cry.