forbidden

/fərˈbɪdən/
adjective
  1. Not allowed; prohibited by a rule, law, or authority.
    • Smoking is forbidden in all public buildings.
    • The forbidden area behind the fence is off-limits to visitors.
    • It is forbidden to park in front of the fire hydrant.
  2. Describing something that is morally or socially unacceptable, often because it is considered taboo or dangerous.
    • The book was once forbidden because of its controversial ideas.
    • They had a forbidden romance that their families disapproved of.
    • In many cultures, certain topics are considered forbidden to discuss in public.
verb
  1. Past participle of forbid: having been ordered not to do something or made not allowed.
    • The law has forbidden the sale of certain chemicals.
    • They had forbidden their children to watch that movie.
    • The teacher has forbidden the use of calculators during the test.