1. To be unable to do something because you do not have permission to do it; to be not allowed to so something by some authority, especially the law. English = (be) forbidden, (be) prohibited, (be) illegal.
2. To order someone not to do something, especially in law. English = forbid, prohibit, make illegal.
3. To officially stop someone from taking part in an event, activity, or competition because they have broken a law or rule; or to have this happen to you. English = disqualify; (be) disqualified.