There are 2 definitions of quack in English:

quack1

Line breaks: quack
Pronunciation: /kwak
 
/

noun

  • The characteristic harsh sound made by a duck: I heard a quack and saw some ducks huddled together
    More example sentences
    • But even from the vague hints he throws out, I think we may rest assured it will not be the last quack of a lame duck.
    • This is an interesting link for anyone who was wondering about those duck quacks.
    • I'm sorry to say that it's not true about the quack of a duck.

verb

[no object] Back to top  
  • 1(Of a duck) make a quack: ducks quacked from the lake
    More example sentences
    • Yet, in case after case, the chicken always ended up dead, while the duck went happily quacking down the river.
    • We strolled up a steep street, where wild ducks quacked for food outside a shop, and into a quiet garden.
    • Down near the pond, the ducks were quacking at an old couple that was throwing pieces of stale bread at them.
  • 1.1 informal (Of a person) talk loudly and foolishly: he was still quacking about vinyl’s alleged superiority to CDs
    More example sentences
    • Ever since Ride the Ducks came to town, I've watched those vessels drive by, its frenzied tourists quacking away.
    • Some of these remedies have been closer to quack concoctions.

Origin

mid 16th century (as a verb): imitative.

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Word of the day kerf
Pronunciation: kərf
noun
a slit made by cutting with a saw

There are 2 definitions of quack in English:

quack2

Line breaks: quack
Pronunciation: /kwak
 
/

noun

Derivatives

quackery

noun
More example sentences
  • The Skeptic's Dictionary is a compendium of detailed information about oft-repeated hoaxes, legends and quackery.
  • Why did this quackery get so far before being exposed?
  • Alarm made him listen to all manner of quackery.

quackish

adjective
More example sentences
  • Barrett goes on to describe the history of naturopathy and to list some of the quackish practices that have been included in naturopathy.
  • Obviously, Paul, anyone stupid enough to take your quackish advice deserves their outcomes.

Origin

mid 17th century: abbreviation of earlier quacksalver, from Dutch, probably from obsolete quacken 'prattle' + salf, zalf (see salve1).

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