warn
v.v. to tell someone about a possible danger or problem so they can avoid it. You do this to help people stay safe or prepared.
v. to inform someone in advance of a potential danger, problem, or unpleasant consequence. Transitive; typically followed by a direct object and a prepositional phrase or a clause.
The signs warn drivers about the icy roads.
The weather service issued a statement to warn residents that a heavy storm would arrive by midnight.
Economists continue to warn that persistent inflation may eventually erode the purchasing power of middle-income households if wage growth remains stagnant.
From Middle English warnen, warnien (“to warn; admonish”), from Old English warnian (“to take heed; warn”), from Proto-Germanic warnōną (“to warn; take heed”), from Proto-Indo-European wer- (“to be aware; give heed”). Cognate with Dutch waarnen (obsolete), German Low German warnen, German warnen, Swedish varna, Icelandic varna.
The verb is transitive and often takes the preposition 'about' or 'of' before the danger, or a 'that' clause.
He warned me for the danger.He warned me about the danger.The verb warn typically pairs with 'about' or 'of' to indicate the threat, rather than 'for'.