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quack

Intermediate (B1)

IPA: /kwæk/

KK: /kwæk/

adjective
Definition

Describing something that is associated with a fraud or a person who pretends to have medical skills without proper qualifications.


Example

The doctor was known for his quack treatments that promised miraculous results.


Conversation
Sloth A
Did you hear about that quack doctor who claims he can cure anything?
Sloth B
Yeah, I saw that online — it's hard to believe people fall for that.
Sloth A
I know, right? It makes me wonder how many quack remedies are out there.
Sloth B
Too many, I bet! We should stick to real medical advice.

Synonyms & Antonyms
Synonyms
fraudulent
charlatan
phony
Antonyms
genuine
authentic
real
intransitive verb
Definition

To make the sound that ducks make, which is a short, sharp noise.


Example

The ducks quack loudly every morning at the pond.


Tense Forms

Past: quacked

Past Participle: quacked


Conversation
Sloth A
Did you hear that duck quack at the park yesterday?
Sloth B
Yeah, it was so loud! I couldn't stop laughing.
Sloth A
I know, right? It's funny how they just quack without a care in the world.
Sloth B
noun
Definition

A person who pretends to be a doctor or has medical skills but is not qualified; often used to describe someone who gives false medical advice.


Example

The town was warned about the quack who was offering fake treatments.


Conversation
Sloth A
Did you hear that weird sound outside?
Sloth B
Yeah, it sounded like a quack from a duck!
Sloth A
I thought it was just someone pretending to be a doctor or something.
Sloth B
Root Explanation

Quack → The word originates from the Dutch 'quacken', meaning to croak or to make a sound like a duck. It refers to the sound made by a duck, and by extension, it has come to describe someone who pretends to have medical skills or knowledge without being qualified.

Memory Tip

Imagine the sound a duck makes — 'quack' — and think of someone pretending to have skills, just like a duck making noise without real substance.

Visually Confused Words
quick
queak
quawk
quauk
quark
quaky
quake
Is this page helpful?
Exactly! They really add a lot of character to the place.

Synonyms & Antonyms
Synonyms
croak
squawk
quackery
Antonyms
heal
cure
treat
Right? Some people really act like total quacks!

Synonyms & Antonyms
Synonyms
charlatan
fraud
quackery
Antonyms
expert
professional
authority