taboo
🇺🇸
/təˈbuː/
🇬🇧
/təˈbuː/
not allowed to be talked about because it is offensive or embarrassing
Talking about money is taboo in many polite conversations.
a cultural or religious rule that forbids doing or talking about something
Eating certain foods is a taboo in some religions.
an unspoken agreement not to do or discuss something
There's a family taboo about discussing politics at dinner.