Translation guide
The sound a duck makes, or a person pretending to be a doctor.
The noise a duck makes.
The most common onomatopoeia for a duck's quack in Japanese.
アヒルがガーガー鳴いている。
The duck is quacking.
A less common but recognized rendering, closer to the English sound.
絵本ではアヒルが「クワックワッ」と鳴く。
In picture books, ducks go "quack quack".
A person who pretends to be a doctor without qualifications.
Literally 'fake doctor'. The standard term for a quack doctor.
彼は偽医者だとばれた。
He was exposed as a quack.
A colloquial term for an incompetent or quack doctor. Often used humorously.
あの医者はヤブ医者だよ。
That doctor is a quack.
Literally 'underground doctor', implying unlicensed practice.
もぐりの医者に手術を受けるのは危険だ。
It's dangerous to have surgery by a quack.