taboo.

Excluded or forbidden from use, approach, or mention

a taboo subject.

forbidden to profane use especially in South Pacific islands[syn: taboo ]

excluded from use or mention; "forbidden fruit"; "in our house dancing and playing cards were out"; "a taboo subject"[syn: forbidden ]

a prejudice (especially in Polynesia and other South Pacific islands) that prohibits the use or mention of something because of its sacred nature[syn: taboo ]

an inhibition or ban resulting from social custom or emotional aversion[syn: taboo ]

noun

taboo