| forbidden(adjective, offensive, permitted, prohibited, unthinkable) |
| out of bounds(expression, adjective, idiom, refusal, prohibition) |
| taboo(adjective, bar, offensive, ban, refusal) |
| banned(adjective, offensive, permitted, prohibited, unthinkable) |
| illegal(adjective, offensive, permitted, prohibited, unthinkable) |
| outlawed(adjective, offensive, illegal, permitted, prohibited) |
| prohibited(adjective, offensive, illegal, permitted, unthinkable) |
| restricted(adjective, offensive, permitted, prohibited, unthinkable) |
| forbiddance(noun, ban, veto, exclusion, refusal) |
| illicit |
| not permitted(expression, adverb, off-limits) |
| ruled out(expression, offensive, permitted, prohibited, unthinkable) |
| tabu |
| unlawful |
| verboten |
| anathema(adjective, offensive, taboo, permitted, prohibited) |
| ban(noun, bar, sanction, disapproval, veto) |
| barred |
| beyond the pale(expression, adjective, idiom, offensive, taboo) |
| censorship(bar, veto, refusal, prohibition, suppression) |