卫生间在英语中可以用 bathroom 或 toilet 来表示。它的来源是由 bathroom 和 toilet 两个单词组合而成。bathroom 来自于拉丁语的 "baths" 和 "room"，意思是浴室。toilet 来自法语的 "toilette"，意思是梳妆台。例句如下：

Can you tell me where the bathroom is?

I need to use the toilet.

Please keep the bathroom clean.

She spent an hour getting ready in the toilet.