# quack

Pronunciation: say "KWAK" /kwæk/

## Noun

1. The short, harsh call that a duck makes.
   - Simple: The short, loud sound that a duck makes.
   - _A single quack echoed across the still pond at dawn._
   - _The duck let out a rapid series of quacks when the dog approached._
3. A fraudulent healer, especially one who loudly peddles worthless treatments or uses fake credentials to attract trusting patients.
   - Simple: A person who pretends to be a doctor to cheat sick people out of money.
   - _The traveling quack promised his bottled tonic could cure any disease._
   - _Investigators exposed the clinic's lead physician as a quack with forged diplomas._
5. A charlatan or incompetent practitioner in any profession.
   - Simple: A person in any job who pretends to have skills they do not really have.
   - _The startup's so-called security guru turned out to be a quack._
   - _Real engineers dismissed him as a quack peddling junk science._
7. A doctor; a slang term used jokingly or dismissively rather than as a true charge of fraud. *(slang)*
   - Simple: A joking, slightly rude way to refer to a doctor.
   - _I finally booked an appointment with the quack down the road._
   - _She told the quack her back had been aching for weeks._

## Verb

2. To produce the harsh, repeated call characteristic of a duck.
   - Simple: To make the short, loud sound that a duck makes.
   - _The ducks quack noisily as soon as feeding time arrives._
   - _Something in the reeds quacked twice and then went silent._
8. To practice fraudulent medicine; to deceive people with worthless cures.
   - Simple: To work as a fake doctor, selling treatments that do not work.
   - _He quacked for years before the authorities finally shut down his practice._
   - _Charlatans quack wherever desperate patients can be found._
9. In beekeeping, used of a queen bee: to give out a shrill sound at certain stages of its development.
   - Simple: Of a young queen bee, to make a high-pitched sound at certain stages of growing.
   - _Newly developed queens quack while still confined to their cells._
   - _Beekeepers suspect swarming is near when the queens quack and pipe._

## Adjective

4. Falsely presented as having the power to heal or cure.
   - Simple: Sold as a cure but really having no power to heal.
   - _The pamphlet advertised a quack treatment for arthritis._
   - _Authorities banned several quack devices that claimed to cure cancer._

## Interjection

6. Used to represent or imitate the call of a duck.
   - Simple: Used to copy the sound a duck makes.
   - _Quack! she said, mimicking the bird for her delighted toddler._
   - _From behind the curtain came a sudden, theatrical "Quack!"_

## Verb

10. To make vain, loud boasts and pretensions. *(obsolete)*
   - Simple: To boast loudly and make empty claims about oneself.
   - _He quacked endlessly of victories he had never actually won._
   - _Courtiers who quack of their influence rarely possess any._

## Origin

**Meanings 1–2, 6, 9** — From Middle English quacken ("to croak like a frog; make a noise like a duck"), partly imitative of the sound and partly from Middle Dutch quacken ("to croak, quack"), going back through Proto-Germanic *kwakaną ("to croak"), also of imitative origin. It is related to German quaken and Danish kvække.
**Meanings 3–5, 7–8, 10** — A clipping of quacksalver, of Dutch origin, and ultimately related to the first etymology above.

Source: DictionaryAI, https://dictionaryai.com/define/quack (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).