warned
v.v. to tell someone about a possible danger or problem before it happens. You do this so they can stay safe or be ready.
v. to inform someone in advance of a potential danger, problem, or unpleasant situation. Often implies a protective intent or a formal notification of consequences.
The sign warned us about the slippery floor.
Local authorities warned residents to stay indoors as the storm approached the coast.
Economists had warned for months that the housing bubble would eventually burst, yet few investors took the necessary precautions to protect their assets.
The verb is transitive and typically takes a direct object (the person) followed by a prepositional phrase starting with 'about' or 'of', or a 'that' clause.
he warned to mehe warned meWarn is a transitive verb and takes a direct object without the preposition 'to'.