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quack (1)

quack [ kwak ]


noun  (plural quacks)
Definition:
 
sound made by duck: the harsh sound typically made by a duck



intransitive verb  (past and past participle quacked, present participle quack·ing, 3rd person present singular quacks)
Definition:
 
1. make sound of duck: to make the harsh sound that is characteristic of a duck

2. speak irritatingly: to speak loudly and endlessly in an irritating manner ( slang )

[Early 17th century. An imitation of the sound]
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