Verb
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notify, usually in advance
"I warned you that I would ask some difficult questions"
-
ask to go away
"The old man warned the children off his property"
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admonish or counsel in terms of someone's behavior
"I warned him not to go too far"
"I warn you against false assumptions"
"She warned him to be quiet"
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notify of danger, potential harm, or risk
"The director warned him that he might be fired"
"The doctor warned me about the dangers of smoking"