To counteract, to act against, to frustrate.
To recall a person or unit with such an order.
To revoke (a former command); to cancel or rescind by giving an order contrary to one previously given.
To cancel an order for (some specified goods).
An order to the contrary of a previous one.
To caution or admonish (someone) against unwise or unacceptable behaviour.
To notify or inform (someone, about something).
To give warning.
To summon (someone) to or inform of a formal meeting or duty.
To advise or order to go or stay away.
To make (someone) aware of impending danger, evil, etc.