absurd, ridiculous, silly这一组形容词都有“愚蠢，可笑”的意思。
absurd a.荒谬的，可笑的，指因不符合常识、违反真理或不合逻辑而令人发笑。
There was an absurd idea that the earth was flat and motionless.
过去曾经有一种荒谬的观点认为地球呈扁平状而且静止不动。
ridiculous a.荒唐可笑的，指因为愚昧无知而令人发笑并成为笑柄，含有蔑视成分。
It is ridiculous to judge a foreign culture only by its food.
仅仅根据一个国家的饮食来评价该国家的文化是荒唐可笑的。
silly a.愚蠢的，傻的，指由于单纯或者头脑简单而显得愚蠢。
a silly little boy 傻小子
How can you explain such a silly remark?
你怎能解释这样一个愚蠢的意见?
He's been plaguing me with silly questions all day!
他整天老是拿愚蠢的问题来烦我!
This short novel was stuffed out with silly conversation.
这部短篇小说用无聊的对话拉得很长。
