taboo

在某些家庭里，谈论政治话题是个禁忌。

In some families, discussing politics is a ___taboo.

在某些文化中，谈论死亡是一个禁忌话题。

In some cultures, talking about death is considered a ___taboo.

在他们的文化中，与某些特定的树木接触是禁忌。

In their culture, touching certain trees is considered ___taboo.