Repudiate

abandon abjure apostatize banish be against break with cast cast off cut off decline default defect demur deny desert disacknowledge disapprove disavow discard disclaim dishonor disinherit dismiss disown dump flush fly in the face of forsake nix oust rat recant refuse renounce repeal reprobate rescind retract reverse revoke spurn tergiversate tergiverse turn turn down wash one’s hands of