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Definition quack

Etymology 1

From Middle English *quacken, queken (�to croak like a frog; make a noise like a duck, goose, or quail�), from quack, qwacke, quek, queke (�quack�, interjection and noun), also kek, keke, whec-, partly of imitative origin and partly from Middle Dutch quacken (�to croak, quack�), from Old Dutch *kwaken (�to croak, quack�), from Proto-Germanic *kwakan?, *kwak?n? (�to croak�), of imitative origin. Cognate with Saterland Frisian kwoakje, kwaakje (�to quack�), Middle Low German quaken (�to quack, croak�), German quaken (�to quack, croak�), Danish kv�kke (�to croak�), Swedish kv�ka (�to croak, quackle�), Norwegian kvekke (�to croak�), Icelandic kvaka (�to twitter, chirp, quack�).

Noun

quack (plural quacks)

1. The sound made by a duck.

Verb

quack (third-person singular simple present quacks, present participle quacking, simple past and past participle quacked)

1. To make a noise like a duck.

Etymology 2

Clipping of quacksalver, from Middle Dutch kwaksalver (�hawker of salve�) (modern Dutch kwakzalver), from quacken (�to brag, boast; to croak�). Ultimately related to etymology one, above.

Noun

quack (plural quacks)

1. A fraudulent healer or incompetent professional, especially a doctor of medicine; an impostor who claims to have qualifications to practice medicine. [from c. 1630]
2. A charlatan.
3. (slang) A doctor.

Verb

quack (third-person singular simple present quacks, present participle quacking, simple past and past participle quacked)

1. To practice or commit quackery.
2. (obsolete) To make vain and loud pretensions; to boast.

Adjective

quack (comparative more quack or quacker, superlative most quack or quackest) (quacker and quackest are rare, and probably used humorously)

1. Falsely presented as having medicinal powers.

Results 28 Words with the letters QUACK

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