quack
quack /kw'æk/ (quacks quacking quacked)
1 [N-COUNT] oft N n
If you call someone a quack or a quack doctor, you mean that they claim to be skilled in medicine but are not.
I went everywhere for treatment, tried all sorts of quacks.
2 [ADJ] ADJ n
Quack remedies or quack cures are medical treatments that you think are unlikely to work because they are not scientific.
3 [VERB] V
When a duck quacks, it makes the noise that ducks typically make.
There were ducks quacking on the lawn.
[N-COUNT; SOUND]
Quack is also a noun.
Suddenly he heard a quack.
1 [N-COUNT] oft N n
If you call someone a quack or a quack doctor, you mean that they claim to be skilled in medicine but are not.
I went everywhere for treatment, tried all sorts of quacks.
2 [ADJ] ADJ n
Quack remedies or quack cures are medical treatments that you think are unlikely to work because they are not scientific.
3 [VERB] V
When a duck quacks, it makes the noise that ducks typically make.
There were ducks quacking on the lawn.
[N-COUNT; SOUND]
Quack is also a noun.
Suddenly he heard a quack.