Simple past tense and past participle of countermand.(verb)
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Use "countermanded" in a sentence
"Minister’s counsel and again countermanded his order to slay his son."
"Resolved, that the committee on finance be instructed to enquire into the expediency of paying for clothing, & c. furnished to a portion of the militia of Roanoke when called out by the authorities, and the call countermanded before the said militia were mustered into service."
"Moreover, the orders to move were countermanded so the corps could chase deserters and round up transport, then reissued, then countermanded again.2"