forewarn (someone) of (something)

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forewarn (someone) of (something)

To inform someone of something in advance. Thanks for forewarning me of the boss's foul mood today—I made sure to steer clear of him.
See also: forewarn, of
References in periodicals archive ?
Elsewhere, clans in the Kunar and Swat valleys had put up extraordinary resistance, forewarning one of history's greatest military geniuses.