n. a person who is not very bright
a. lacking or marked by lack of intellectual acuity
a. 愚蠢的, 麻木的
1. I made a stupid mistake on my exam.
我在考试中犯了一个愚蠢的错误。
2. It's stupid to argue about something so small.
为这么小的事情争论是愚蠢的。
3. He felt stupid for forgetting his friend's birthday.
他因为忘记朋友的生日而感到愚蠢。