stupider , stupidest
If you say that someone or something is stupid, you mean that they show a lack of good judgment or intelligence and they are not at all sensible.
I'll never do anything so stupid again.
我再也不会做这么愚蠢的事了。
I made a stupid mistake.
我犯了个愚蠢的错误。
You say that something is stupid to indicate that you do not like it or that it annoys you.
I wouldn't call it art. It's just stupid and tasteless.
我不把它看作是艺术。它令人讨厌且毫无品味。