foolish
单词辨析：
常指人因智力低下或其他原因而显得愚笨、迟钝的，往往含呆滞木讷之意；口语中多指人或物令人气恼或讨厌的。
At 7 Edison entered school but left it after 3 months, for the teacher thought he was stupid.
爱迪生7岁上学，但3个月后便离开了学校，因为老师认为他笨。
He was so quiet that everyone assumed he was stupid.
他寡言少语，大家都以为他很愚笨。
I can't get this stupid radio to work!
我无法弄响这台讨厌的收音机！
常用于形容人或行为，强调缺乏智慧或判断力的。
It was foolish of her to have spent so much money on shoes.
她把那么多的钱花在鞋上真是太傻了。
His foolish behaviour led to his eventual failure.
他的愚蠢行为导致了他最终的失败。
How foolish I was not to have bought it!
我没买下它真是太傻了！
多用于口语，语气比 foolish 重，指人极端或明显愚蠢的，或傻里傻气、不懂事的；形容行为、言语等时意为“无聊的”、“无意义的”。
He has no common sense and always does silly things.
他毫无常识，总是做些傻事。
It's silly of you to ask such questions.
你竟然提出这种问题，实在是太蠢了。
I'll thank you not to be silly and spoil my fun.
拜托你别这么傻头傻脑的，败了我的兴致。
That new play struck me as silly.
我觉得那出新戏很无聊。
相关例句：
I was wrong. I was foolish.
我错了，我太愚蠢了。
He is notorious for being a foolish emperor.
他是历史上有名的暗弱昏君。
Better a witty fool man than a foolish wit.
宁做聪明的傻子，不做愚蠢的聪明人。
I feel how foolish I am to entertain doubts
我竟然心存怀疑，真是太愚蠢了。
I just stood there feeling foolish and watching him
我只是傻傻地站在那里看着他。
Don't close with him; he is a foolish man.
别跟他打架，他是个傻子。