Noah Webster
Countermand
COUNTERMAND, verb transitive [Latin , to command.]
1. To revoke a former command; or to give an order contrary to one before given, which annuls a former command and forbids its execution; as, to countermand orders.
2. To oppose; to contradict the orders of another.
3. To prohibit. [Little Used.]
COUNTERMAND, noun A contrary order; revocation of a former order or command.