quackKK [ˈkwæk] ｜ /ˈkwæk/
GEPT 中高級
C2noun
the harsh sound made by a duck
As we strolled by the pond, we could hear the quack of the ducks echoing through the air.
（鴨子的）嘎嘎聲
C2verb
to make the harsh sound that a duck makes
The pond echoed with the quack of nearby ducks as they splashed and waddled.
（鴨子）嘎嘎叫
C2noun
a person who pretends to be a doctor and gives out medical advice without proper training or credentials
The self-proclaimed healer set up a booth at the fair, claiming to cure any ailment with his mysterious herbs and chants. However, he was just a quack, lacking any legitimate medical expertise.
C2adjective
not having the proper medical training or credentials
The patient went to see a quack for their back pain, but the treatment only made it worse.
C2verb
to pretend to be a doctor or give out medical advice without proper training
During the health conference, a self-proclaimed healer would quack about miraculous cures and encourage people to abandon traditional medicine.