prohibitory
From Longman Dictionary of Contemporary Englishprohibitorypro‧hib‧i‧to‧ry /prəˈhɪbətəri $ proʊˈhɪbətɔːri/ adjective formal FORBIDintended to stop somethingExamples from the Corpusprohibitory• The treaty in question does not contravene any prohibitory words to be found in the Constitution.