stupid

/ˈstupɪd/

a person who is not very bright

中文释义：傻瓜；笨蛋

Don't be such a stupid; you should have checked the map before leaving.

别这么傻了；你出发前应该查一下地图。

He felt like a stupid for forgetting his own birthday.

他觉得自己像个傻瓜，竟然忘了自己的生日。