A taboo subject or activity is one that people avoid because many people find it embarrassing or offensive.
Cancer is a taboo subject and people are frightened or embarrassed to talk openly about it.
癌症是个禁忌的话题,人们对公开谈论癌症感到害怕或尴尬。
taboos
A taboo against a subject or activity is a social custom to avoid doing that activity or talking about that subject, because people find them embarrassing or offensive.
The topic of addiction remains something of a taboo in our family.
毒瘾在我们家依然是个有些忌讳的话题。