Definition: silly or not intelligent Level: B1
我犯了个愚蠢的错误。
I just made a ___stupid mistake.
是谁想出晚上旅行这个蠢主意的？
Whose ___stupid idea was it to travel at night?
他就那样辞职真是愚蠢。
It was ___stupid to quit his job like that.
