adj.不可提及的，不宜述说的，难以启齿的
n.难于说出口的事物；〈谑〉裤子；内衣

The topic of politics is often considered unmentionable at family gatherings.
在家庭聚会上，政治话题往往被认为是不宜提及的。

It's still unmentionable to talk about mental health in some parts of the world.
在世界上某些地区，谈论心理健康仍然是禁忌。

The subject of death and dying is still largely unmentionable in many cultures.
许多文化中，死亡和垂死的主题仍然很大程度上是禁忌的。

I can't believe she brought up that unmentionable topic during dinner!"
我真不敢相信她在晚餐时提起了那个禁忌的话题！

There are certain things that are just too unmentionable to discuss openly.
有些事情太过禁忌，无法公开讨论。

It's amazing how quickly something becomes unmentionable when it's controversial.
当某事有争议时，它会多么迅速地成为禁忌。

The elephant in the room is an unmentionable topic that everyone knows about but no one wants to talk about.
那头房间里的大象是一个大家都心知肚明但谁也不想谈论的禁忌话题。

He has some unmentionable secrets from his past that he doesn't want anyone to know about.
他有一些来自过去的禁忌秘密，不想让任何人知道。

It's hard to believe that such an unmentionable act could be committed by someone we know.
难以置信的是，这样一件禁忌的行为竟然是我们认识的人所为。

The unmentionable truth is that we all have our flaws and imperfections.
禁忌的真相是，我们都有自己的缺点和不完美。