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to warn
01
to tell someone in advance about a possible danger, problem, or unfavorable situation
Transitive: to warn sb of a danger or problem | to warn sb about a danger or problem
02
advise or counsel in terms of someone's behavior
Ditransitive: to warn sb to do sth | to warn sb against sth
Transitive: to warn against sth
03
to inform or alert someone about something before it happens
Ditransitive: to warn sb that
warn
v
warner
n
warner
n
warning
adj
warning
adj
warning
n
warning
n
Example
The detective warned the witness about the possible threats to their safety.
The lifeguard warned the swimmers about the dangerous rip currents.
The software system warned users about potential security risks.
The weather forecast warned residents of an approaching storm.
The transverse stripes on the road warn drivers of an upcoming intersection.
