revoke

[1]	cancel , deny , invalidate , annul , declare null and void , void , nullify , negate , repudiate , renounce , rescind , repeal , recall , recant , quash , veto , set aside , abrogate , abolish , withdraw , take back , retract
[2]	annul , lift , countermand , reverse , repeal , overturn , rescind , vacate

[1]

renege