Synonyms of disallowed

1 Syllable
zing, nix, kill
2 Syllables
disclaim, withhold, censor, deny, debar, taboo, forbid, veto, cancel, disown, rebuff, dismiss
3 Syllables
exclude, disavow, embargo, verboten, abjure, proscribe, refuse
4 Syllables
repudiate
5 Syllables
disacknowledge