| keeping out(expression, sanction, disapproval, relegation) |
| limit(noun, control, check, condition, restraint) |
| lockout(sanction, disapproval, relegation) |
| monkey(noun, force, restraint, pressure, spring) |
| motive(noun, force, restraint, pressure, spring) |
| must(noun, force, restraint, pressure, spring) |
| necessity(noun, force, restraint, pressure, spring) |
| negation(noun, ban, veto, constraint, exclusion) |
| no-go |
| nonadmission(sanction, disapproval, relegation) |
| nonstarter(noun, impossibility) |
| not sanctioned(expression, adjective, unwarranted, permitted, illegitimate) |
| obstruction(noun, ban, veto, constraint, exclusion) |
| off-limits(adjective, prohibited) |
| official forbiddance(noun, expression, bar, veto, refusal) |
| opuscule |
| ostracism(sanction, disapproval, relegation) |
| out of line(expression, adjective, idiom, unwarranted, illegitimate) |
| outlawing(veto, forbidding, prohibition) |
| over the line(expression, adjective, idiom, unwarranted, illegitimate) |