Standard Lemma guide

quack

adj · intj · noun · verb · 15 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /kwæk/
  • General-American: Recorded audio is listed in the source snapshot.
  • rhymes with -æk
  • CMU ARPABET: K W AE1 K Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Falsely presented as having medicinal powers.

Definition source: English Wiktionary via Wiktextract

Examples

  • Don't get your hopes up; that's quack medicine!

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

intj

Meaning 2

A duck's quack.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

The vocalisation made by a duck.

Definition source: English Wiktionary via Wiktextract

Examples

  • Did you hear that duck make a quack?

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

A fraudulent healer, especially a bombastic peddler in worthless treatments, a doctor who makes false diagnoses for monetary benefit, or an untrained or poorly trained doctor who uses fraudulent credentials to attract patients

Definition source: English Wiktionary via Wiktextract

Usage: derogatory

Examples

  • That doctor is nothing but a lousy quack!
  • 1662, Rump: or an Exact Collection of the Choycest Poems and Songs Relating to Late Times, Vol. II, by ‘the most Eminent Wits’ Tis hard to say, how much these Arse-wormes do urge us, We now need no Quack but these Jacks for to purge us, ...

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

Any similar charlatan or incompetent professional.

Definition source: English Wiktionary via Wiktextract

Usage: derogatory, figuratively

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

Any doctor.

Definition source: English Wiktionary via Wiktextract

Usage: derogatory, humorous, mildly, slang

Examples

  • That quack wants me to quit smoking, eat less, and start exercising. The nerve!

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

verb

Meaning 7

Of a duck, to make its characteristic vocalisation.

Definition source: English Wiktionary via Wiktextract

Examples

  • The more breadcrumbs I threw on the ground, the more they quacked.
  • Do you hear the ducks quack?

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

verb

Meaning 8

To make a sound similar to the quack of a duck.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

verb

Meaning 9

Of a queen bee: to make a high-pitched sound during certain stages of development.

Definition source: English Wiktionary via Wiktextract

Usage: intransitive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

verb

Meaning 10

To practice or commit quackery (fraudulent medicine).

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

verb

Meaning 11

To make vain and loud pretensions.

Definition source: English Wiktionary via Wiktextract

Usage: obsolete

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: boast

Antonyms: none provided

12

noun

Meaning 12

the harsh sound of a duck

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: sound

13

noun

Meaning 13

an untrained person who pretends to be a physician and who dispenses medical advice

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: doctor, doc, physician, MD, Dr., medico, mountebank, charlatan

14

verb

Meaning 14

act as a medical quack or a charlatan

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: act, behave, do

15

verb

Meaning 15

utter quacking noises

Definition source: Princeton WordNet 3.0

Examples

  • The ducks quacked

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: utter, emit, let out, let loose

History

Etymology

Etymology tree Middle Dutch quacsalven Dutch quacksalverbor. English quacksalverclip. English quack Clipping of quacksalver (see there for more), of Dutch origin; ultimately related to Etymology 1 above.

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-West Germanic *kwakōn, from Proto-Germanic *kwakaną, *kwakōną (“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 kvække (“to croak”), Swedish kväka (“to croak, quackle”), Norwegian kvekke (“to croak”), Icelandic kvaka (“to twitter, chirp, quack”).

Across languages

Translations

225 source translations are retained for this English entry.

  • Icelandic: svika- — falsely presented as having medicinal powers
  • Icelandic: fals- — falsely presented as having medicinal powers
  • Icelandic: skottu- — falsely presented as having medicinal powers
  • Italian: empirico — falsely presented as having medicinal powers
  • Polish: szarlatański — falsely presented as having medicinal powers
  • Chinese Mandarin: 嘎嘎 (gāgā) — duck's sound
  • German: quak — duck's sound
  • Macedonian: квак (kvak) — duck's sound
  • Polish: kwa — duck's sound
  • Romanian: mac — duck's sound
  • Tamil: குவா (kuvā) — duck's sound
  • Arabic: بَطْبَطَة (baṭbaṭa) — sound made by a duck
  • Arabic: زَبْط (zabṭ) — sound made by a duck
  • Assamese: পেঁক পেঁক (pẽk pẽk) — sound made by a duck
  • Bulgarian: крякане (krjakane) — sound made by a duck
  • Catalan: nyec — sound made by a duck
  • Chinese Mandarin: 嘎 (gá) — sound made by a duck
  • Chinese Mandarin: 呱 (guā) — sound made by a duck
  • Danish: rap — sound made by a duck
  • Dutch: kwak — sound made by a duck
  • Esperanto: kvako — sound made by a duck
  • Estonian: prääks — sound made by a duck
  • Faroese: gvagg — sound made by a duck
  • Faroese: kvagg — sound made by a duck
  • Finnish: kvaak — sound made by a duck
  • French: coin-coin — sound made by a duck
  • Georgian: ყიყინი (q̇iq̇ini) — sound made by a duck
  • German: Quaken — sound made by a duck
  • Greek: πα πα — sound made by a duck
  • Hungarian: háp — sound made by a duck
  • Hungarian: hápogás — sound made by a duck
  • Icelandic: andagagg — sound made by a duck
  • Icelandic: guss — sound made by a duck
  • Ido: kroaso — sound made by a duck
  • Ido: bramo — sound made by a duck
  • Indonesian: kwek — sound made by a duck
  • Indonesian: kuik — sound made by a duck
  • Indonesian: wak — sound made by a duck
  • Irish: vác — sound made by a duck
  • Italian: qua qua — sound made by a duck
  • Japanese: ガー ガー (gā-gā) — sound made by a duck
  • Japanese: クェッ クェッ (kuek-kuek) — sound made by a duck
  • Japanese: クワッ クワッ (kuwak-kuwak) — sound made by a duck
  • Korean: 꽥꽥 (kkwaekkkwaek) — sound made by a duck
  • Macedonian: ква́к (kvák) — sound made by a duck
  • Malay: wak — sound made by a duck
  • Northern Mansi: эт-эт (èt-èt) — sound made by a duck
  • Northern Mansi: э̄тгыл (è̄tgyl) — sound made by a duck
  • Māori: keakea — sound made by a duck
  • Māori: kēkē — sound made by a duck
  • Norwegian: kvakk — sound made by a duck
  • Polish: kwaknięcie — sound made by a duck
  • Polish: kwak — sound made by a duck
  • Portuguese: quá — sound made by a duck
  • Portuguese: quac — sound made by a duck
  • Portuguese: qué — sound made by a duck
  • Portuguese: quém — sound made by a duck
  • Romanian: măcăit — sound made by a duck
  • Romanian: măcănit — sound made by a duck
  • Romanian: măcăitură — sound made by a duck
  • Russian: кря (krja) — sound made by a duck
  • Russian: кря-кря́ (krja-krjá) — sound made by a duck
  • Russian: кря́канье (krjákanʹje) — sound made by a duck
  • Scottish Gaelic: mhàg mhàg — sound made by a duck
  • Spanish: cuac — sound made by a duck
  • Spanish: cua — sound made by a duck
  • Swedish: kvack — sound made by a duck
  • Tagalog: kwak-kwak — sound made by a duck
  • Tamil: குவா (kuvā) — sound made by a duck
  • Thai: ก้าบ (gâap) — sound made by a duck
  • Turkish: vak — sound made by a duck
  • Vietnamese: cạc cạc — sound made by a duck
  • Vietnamese: cạp cạp — sound made by a duck
  • Welsh: cwac — sound made by a duck
  • Armenian: հեքիմ (hekʻim) — fraudulent or incompetent doctor of medicine
  • Bulgarian: знахар (znahar) — fraudulent or incompetent doctor of medicine
  • Chinese Mandarin: 庸醫 /庸医 (yōngyī) — fraudulent or incompetent doctor of medicine
  • Chinese Mandarin: 江湖醫生 /江湖医生 (jiānghú yīshēng) — fraudulent or incompetent doctor of medicine
  • Danish: kvaksalver — fraudulent or incompetent doctor of medicine
  • Dutch: kwakzalver — fraudulent or incompetent doctor of medicine
  • Dutch: kwakzalfster — fraudulent or incompetent doctor of medicine
  • Estonian: imearst — fraudulent or incompetent doctor of medicine
  • Estonian: nurgaarst — fraudulent or incompetent doctor of medicine
  • Finnish: puoskari — fraudulent or incompetent doctor of medicine
  • Finnish: valelääkäri — fraudulent or incompetent doctor of medicine
  • French: charlatan — fraudulent or incompetent doctor of medicine
  • French: charlatane — fraudulent or incompetent doctor of medicine
  • Georgian: ექიმბაში (ekimbaši) — fraudulent or incompetent doctor of medicine
  • German: Quacksalber — fraudulent or incompetent doctor of medicine
  • German: Kurpfuscher — fraudulent or incompetent doctor of medicine
  • Greek: κομπογιαννίτης (kompogiannítis) — fraudulent or incompetent doctor of medicine
  • Greek: αλμπάνης (almpánis) — fraudulent or incompetent doctor of medicine
  • Hebrew: רוֹפֵא אֱלִיל (rofé elíl) — fraudulent or incompetent doctor of medicine
  • Hindi: झोलाछाप (jholāchāp) — fraudulent or incompetent doctor of medicine
  • Hungarian: kuruzsló — fraudulent or incompetent doctor of medicine
  • Hungarian: sarlatán — fraudulent or incompetent doctor of medicine
  • Hungarian: vajákos — fraudulent or incompetent doctor of medicine
  • Icelandic: skottulæknir — fraudulent or incompetent doctor of medicine
  • Ido: sharlatano — fraudulent or incompetent doctor of medicine
  • Ido: medikacho — fraudulent or incompetent doctor of medicine
  • Indonesian: dukun — fraudulent or incompetent doctor of medicine
  • Irish: dochtúir bréige — fraudulent or incompetent doctor of medicine
  • Japanese: 藪医者 (yabuisha) — fraudulent or incompetent doctor of medicine
  • Japanese: もぐりの医者 (moguri no isha) — fraudulent or incompetent doctor of medicine
  • Kannada: ಅಳಲೆಕಾಯಿ ಪಂಡಿತ (aḷalekāyi paṇḍita) — fraudulent or incompetent doctor of medicine
  • Macedonian: надрилекар (nadrilekar) — fraudulent or incompetent doctor of medicine
  • Norman: dgéthisseux — fraudulent or incompetent doctor of medicine
  • Norwegian Bokmål: kvakksalver — fraudulent or incompetent doctor of medicine
  • Norwegian Nynorsk: kvakksalvar — fraudulent or incompetent doctor of medicine
  • Piedmontese: charlatão — fraudulent or incompetent doctor of medicine
  • Polish: szarlatan — fraudulent or incompetent doctor of medicine
  • Polish: szarlatanka — fraudulent or incompetent doctor of medicine
  • Polish: znachor — fraudulent or incompetent doctor of medicine
  • Polish: znachorka — fraudulent or incompetent doctor of medicine
  • Polish: konował — fraudulent or incompetent doctor of medicine
  • Portuguese: mata-sanos — fraudulent or incompetent doctor of medicine
  • Russian: конова́л (konovál) — fraudulent or incompetent doctor of medicine
  • Russian: шарлата́н (šarlatán) — fraudulent or incompetent doctor of medicine
  • Scottish Gaelic: saobh-lèigh — fraudulent or incompetent doctor of medicine
  • Scottish Gaelic: feall-lèigh — fraudulent or incompetent doctor of medicine
  • Scottish Gaelic: sgoiteach — fraudulent or incompetent doctor of medicine
  • Scottish Gaelic: sionnal — fraudulent or incompetent doctor of medicine
  • Spanish: matasanos — fraudulent or incompetent doctor of medicine
  • Swedish: kvacksalvare — fraudulent or incompetent doctor of medicine
  • Tagalog: doktor-laway — fraudulent or incompetent doctor of medicine
  • Thai: หมอกํามะลอ (mɔ̌ɔ-gam-má-lɔɔ) — fraudulent or incompetent doctor of medicine
  • Thai: หมอเถื่อน — fraudulent or incompetent doctor of medicine
  • Turkish: şarlatan — fraudulent or incompetent doctor of medicine
  • Turkish: üfürükçü — fraudulent or incompetent doctor of medicine
  • Turkish: kırlangıç — fraudulent or incompetent doctor of medicine
  • Vietnamese: lang băm — fraudulent or incompetent doctor of medicine
  • Welsh: cwac — fraudulent or incompetent doctor of medicine
  • Armenian: շառլատան (šaṙlatan) — charlatan
  • Bulgarian: шарлатанин (šarlatanin) — charlatan
  • Dutch: kwakzalver — charlatan
  • Dutch: kwakzalfster — charlatan
  • Dutch: charlatan — charlatan
  • Finnish: puoskari — charlatan
  • French: charlatan — charlatan
  • French: charlatane — charlatan
  • Galician: charlatán — charlatan
  • Georgian: შარლატანი (šarlaṭani) — charlatan
  • Georgian: თაღლითი (taɣliti) — charlatan
  • German: Quacksalber — charlatan
  • German: Quacksalberin — charlatan
  • Greek: τσαρλατάνος (tsarlatános) — charlatan
  • Ancient Greek: ὀχλαγωγός (okhlagōgós) — charlatan
  • Hindi: झोलाछाप (jholāchāp) — charlatan
  • Hungarian: sarlatán — charlatan
  • Icelandic: fúskari — charlatan
  • Icelandic: loddari — charlatan
  • Icelandic: falsari — charlatan
  • Icelandic: svikari — charlatan
  • Ido: sharlatano — charlatan
  • Irish: potrálaí — charlatan
  • Irish: soidéalach — charlatan
  • Italian: ciarlatano — charlatan
  • Italian: imbonitore — charlatan
  • Italian: pataccaro — charlatan
  • Japanese: ペテン師 (peten-shi) — charlatan
  • Kannada: ಅಳಲೆಕಾಯಿ ಪಂಡಿತ (aḷalekāyi paṇḍita) — charlatan
  • Macedonian: шарлата́н (šarlatán) — charlatan
  • Polish: szarlatan — charlatan
  • Polish: szarlatanka — charlatan
  • Portuguese: charlatão — charlatan
  • Russian: шарлата́н (šarlatán) — charlatan
  • Scottish Gaelic: sionnal — charlatan
  • Spanish: charlatán — charlatan
  • Thai: นักต้มตุ๋น (nák-dtûm-dtǔn) — charlatan
  • Thai: สิบแปดมงกุฎ (sìp-bpɛ̀ɛt-mong-gùt) — charlatan
  • Thai: กํามะลอ (gam-má-lɔɔ) — charlatan
  • Turkish: şarlatan — charlatan
  • Finnish: puoskari — doctor
  • French: toubib — doctor
  • Ido: sharlatano — doctor
  • Italian: mediconzolo — doctor
  • Polish: medyk — doctor
  • Polish: medyczka — doctor
  • Portuguese: curandeiro — doctor
  • Russian: знахарь (znaxarʹ) — doctor
  • Spanish: curandero — doctor
  • Arabic: زَبَطَ (zabaṭa) — to make a noise like a duck
  • Arabic: يكاكي (yekaaki) — to make a noise like a duck
  • Assamese: পেঁক পেঁকোৱা (pẽk pẽküa) — to make a noise like a duck
  • Bulgarian: крякам (krjakam) — to make a noise like a duck
  • Cornish: kwackya — to make a noise like a duck
  • Czech: káchat — to make a noise like a duck
  • Danish: rappe — to make a noise like a duck
  • Dutch: kwaken — to make a noise like a duck
  • Esperanto: kvaki — to make a noise like a duck
  • Finnish: vaakkua — to make a noise like a duck
  • French: cancaner — to make a noise like a duck
  • Georgian: ყიყინი (q̇iq̇ini) — to make a noise like a duck
  • German: quaken — to make a noise like a duck
  • Hungarian: hápog — to make a noise like a duck
  • Icelandic: gagga — to make a noise like a duck
  • Icelandic: gussa — to make a noise like a duck
  • Ido: kroasar — to make a noise like a duck
  • Ido: bramar — to make a noise like a duck
  • Indonesian: kwek kwek — to make a noise like a duck
  • Interlingua: quaccar — to make a noise like a duck
  • Italian: anatrare — to make a noise like a duck
  • Japanese: ガーガーと鳴く (gā-gā to naku) — to make a noise like a duck
  • Japanese: ガヤガヤしゃべる (gayagaya shaberu) — to make a noise like a duck
  • Latin: tetrinnio — to make a noise like a duck
  • Macedonian: ква́ка (kváka) — to make a noise like a duck
  • Māori: keakea — to make a noise like a duck
  • Māori: kēkē — to make a noise like a duck
  • Norwegian: kvekke — to make a noise like a duck
  • Polish: kwakać — to make a noise like a duck
  • Polish: kwaknąć — to make a noise like a duck
  • Portuguese: grasnar — to make a noise like a duck
  • Portuguese: grasnir — to make a noise like a duck
  • Portuguese: grassitar — to make a noise like a duck
  • Portuguese: gracitar — to make a noise like a duck
  • Romanian: măcăi — to make a noise like a duck
  • Russian: кря́кать (krjákatʹ) — to make a noise like a duck
  • Russian: кря́кнуть (krjáknutʹ) — to make a noise like a duck
  • Spanish: graznar — to make a noise like a duck
  • Spanish: parpar — to make a noise like a duck
  • Swedish: kvacka — to make a noise like a duck
  • Turkish: vaklamak — to make a noise like a duck
  • Bulgarian: шарлатнствам (šarlatnstvam) — commit quackery
  • Dutch: kwakzalveren — commit quackery
  • Polish: uprawiać szarlatanerię — commit quackery
Real reading context

quack in complete knowledge articles