quack
/kwæk; kwæk/ interj, n harsh sound made by a duck （鸭叫的）嘎嘎声. quack, v [I]
make the sound of a duck 作鸭叫.
quack / kwæk; kwæk/ n (infml 口) person who pretends to have special knowledge and skill, esp in medicine 冒充有专门知识和技能的人; （尤指）庸医, 江湖医生
Don't be taken in he's just a quack. 可别上当--他纯粹是江湖医生.
[attrib 作定语]
a quack cure for arthritis 庸医治关节炎的疗法.