1) Ban 2) Criminalise 3) Deny 4) Enjoin 5) Forbid 6) Illegalise 7) Illegalize 8) Nix 9) Prohibit 10) Proscribe 11) Refuse 12) Veto 1) Command 2) Command against 3) Compel 4) Deny 5) Forbid 6) French word used in English 7) Interdict 8) Prohibit 9) Proscribe 10) Refuse to accept 11) Refuse to approve 12) Reject 13) Reject as invalid 14) Require 15) Rule against 16) Rule out 17) To refuse to allow 18) Veto 
• (v. t.) To refuse to allow; to deny the force or validity of; to disown and reject; as, the judge disallowed the executor`s charge.
Dis`al·low' transitive verb [ imperfect & past participle Disallowed ; present participle & verbal noun Disallowing .] [ Prefix dis- + allow : confer Old French desalouer , desloer , to blame, dissuade.] To ...
refuse to allow or accept as a correct 
to refuse to allow; reject; veto: to disallow a claim for compensation. · to refuse to admit the truth or validity of: to disallow the veracity of a report.
command against