Revoke, Rescind, Reverse, Undo, Repeal, Retract, Withdraw, Quash, Overturn, Overrule, Cancel, Annul, Invalidate, Nullify, Negate, Disaffirm, Discharge, Vacate, Abrogate
English Meaning :
(Noun : A contrary command cancelling or reversing a previous command)
(Verb : Cancel officially)
Example : The moment he detected any possible weaknesses in the statements of his envoys in Pakistan or elsewhere he was swift to countermand them.