tabu

Adjective

• excluded from use or mention
  • forbidden fruit
    
  • in our house dancing and playing cards were out
    
  • a taboo subject
    

• forbidden to profane use especially in South Pacific islands

Noun

• an inhibition or ban resulting from social custom or emotional aversion

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

Related words

• Synonyms: 
  forbidden , out(p) , prohibited , proscribed , taboo , verboten