impart knowledge of some fact, state of affairs, or event to

to compel or deter by or as if by threats

a message informing of danger

someone who gives a warning to others

warn in advance or beforehand; give an early warning

warn strongly; put on guard

to utter intentions of injury or punishment against

warn or arouse to a sense of danger or call to a state of preparedness

advise or counsel in terms of someone's behavior