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quack
intransitive verb
to utter the characteristic sound or cry of a duck, or a sound like it
noun
the sound made by a duck, or any sound like it
noun
- an untrained person who practices medicine fraudulently
- any person who pretends to have knowledge or skill that he or she does not have in a particular field; charlatan
adjective
- characterized by pretentious claims with little or no foundation
- dishonestly claiming to effect a cure
intransitive verb
to engage in quackery
See quack in American Heritage Dictionary 4
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