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BNC: 20406 COCA: 23929

quack

1 quack /ˈkwæk/ verb
quacks; quacked; quacking
1 quack
/ˈkwæk/
verb
quacks; quacked; quacking
Learner's definition of QUACK
[no object] of a duck
: to make a loud sound(鸭子)呱呱叫,嘎嘎叫
2 quack /ˈkwæk/ noun
plural quacks
2 quack
/ˈkwæk/
noun
plural quacks
Learner's definition of QUACK
[count]
: the loud sound that is made by a duck(鸭子的)呱呱声,嘎嘎声
compare 3quack
3 quack /ˈkwæk/ noun
plural quacks
3 quack
/ˈkwæk/
noun
plural quacks
Learner's definition of QUACK
[count] informal
disapproving : an unskillful doctor or a person who falsely claims to have medical skills庸医;冒牌医生;江湖郎中
Britishused in usually a negative or humorous way to refer to a doctor医生(通常作否定或诙谐用法)
compare 2quack

— quack

adjective, always used before a noun
BNC: 20406 COCA: 23929

quack

1 of 5

verb (1)

quacked; quacking; quacks

intransitive verb

: to make the characteristic cry of a duck

quack

2 of 5

noun (1)

: a noise made by quacking

quack

3 of 5

verb (2)

quacked; quacking; quacks

intransitive verb

: to act like a quack

quack

4 of 5

noun (2)

1
: charlatan sense 2
Religious quacks on radio and television thinking up new ways to take money from ignorant listeners and incidentally from legitimate churches. Andrew A. Rooney
2
: an ignorant, misinformed, or dishonest practitioner of medicine
No doubt these misunderstandings and dashed hopes have driven many cancer patients and their families into the arms of quacks. Haydn Bush
quackish adjective

quack

5 of 5

adjective

: of, relating to, or used by quacks
quack cancer cures

Word History

Etymology

Verb (1)

alteration of queck to quack, from Middle English queken, from queke, interjection, of imitative origin

Noun (2) and Verb (2)

short for quacksalver

First Known Use

Verb (1)

14th century, in the meaning defined above

Noun (1)

1798, in the meaning defined above

Verb (2)

1628, in the meaning defined above

Noun (2)

1638, in the meaning defined at sense 1

Adjective

1653, in the meaning defined above

Time Traveler
The first known use of quack was in the 14th century
BNC: 20406 COCA: 23929

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