warn

To notify or make aware in advance of something, especially of possible danger or misfortune.

To make known (a warning).

To advise or caution (someone) about a course of action.

To notify (a person) to go or stay away.

A denial; refusal.

To put on guard by timely notice; wake, ware, or give notice to beforehand, as of approaching danger or of something to be avoided or guarded against; caution; admonish; tell or command admonishingly; advise.

To admonish, as to any duty; advise; ex postulate with.

To apprise; give notice to; make ware or aware; inform previously; notify; direct; bid; summon.

To deny; refuse; forbid.

To defend; keep or ward off.