quack C2+ Topic:Senses & Perception US /kwæk/ UK /kwæk/ See IPA manual Meanings 1 noun a fraudulent medical practitioner, or the sound a duck makes The so-called doctor was exposed as a quack selling useless tonics. Thesaurus Synonyms 1 noun · a fraudulent medical... charlatanimpostorfraudmountebankfakepretender ↔ Opposites expertspecialist Word family Derived forms quackeryquacking Related forms quacksalver Etymology AI details In the 'fraud' sense, short for quacksalver, from Dutch kwakzalver ('hawker of salve'). In the duck sense, of imitative (onomatopoeic) origin. kwakzalver Dutch View etymology graph -> Topics Senses & Perception External links Cambridge Dictionary Wiktionary Google Images # quack **Type:** Word **Level:** C2+ **Part of speech:** noun **IPA (US):** /kwæk/ **IPA (UK):** /kwæk/ ## Meanings 1. a fraudulent medical practitioner, or the sound a duck makes ## Examples - The so-called doctor was exposed as a quack selling useless tonics. ## Synonyms - charlatan - impostor - fraud - mountebank - fake - pretender ## Antonyms - expert - specialist ## Derived Forms - quackery - quacking ## Related Forms - quacksalver ## Roots and Affixes - Root: kwakzalver ## Etymology In the 'fraud' sense, short for quacksalver, from Dutch kwakzalver ('hawker of salve'). In the duck sense, of imitative (onomatopoeic) origin. ## AI Etymology Quack is in the 'fraud' sense, short for quacksalver, from Dutch kwakzalver ('hawker of salve'). In the duck sense, of imitative (onomatopoeic) origin. Important recorded forms include kwakzalver (Dutch). The modern sense follows that older lexical line closely. In current use it covers a fraudulent medical practitioner, or the sound a duck makes. The wider family includes derived forms such as quackery and quacking and related words such as quacksalver. ## Topics - Senses & Perception markdown