taboo

Adjective

• forbidden to profane use especially in South Pacific islands

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

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

Verb

• declare as sacred and forbidden

Related words

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