This is the 17334th most frequent Russian word.
табу
"Taboo" – a prohibition or restriction imposed by social or cultural norms.
Here, 'табу' is used as a noun to describe a prohibited or restricted subject.
В нашей культуре обсуждение личных доходов считается табу.
In our culture, discussing personal income is considered taboo.
The word 'табу' functions as a noun, indicating a forbidden or restrained action or behavior.
Это было табу, нарушить которое никто не осмеливался.
It was a taboo that no one dared to break.
'Табу' here represents a noun meaning a cultural or societal prohibition related to a specific topic.