dirty word

The movie is just a lot of sex, violence, and dirty words.那部电影只不过是色情、暴力和粗话的大杂烩。

They regard “taxes” as a dirty word.他们认为“赋税”是个讨厌的字眼。

Politics is a dirty word [=they don't talk about politics] in their home.在他们家里政治是个不招人喜欢的话题。

The way he acts, you'd think compassion was a dirty word.看到他的一举一动，你会认为同情是个令人讨厌的字眼。