forewarn (someone) about (something)

forewarn (someone) about (something)

To inform someone of something in advance. Thanks for forewarning me about the boss's foul mood today—I made sure to steer clear of him.
See also: forewarn
Farlex Dictionary of Idioms.

forewarn someone about something

 and forewarn someone of something
to warn someone about someone or something. They forewarned us of your strange behavior. Didn't we forewarn you about Max's problem?
See also: forewarn
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • forewarn
  • forewarn (someone) of (something)
  • forewarn about
  • be sick to death of (someone or something)
  • at risk to (someone, something, or oneself)
  • at risk to yourself/somebody/something
  • do (something) at (one's) own risk
  • do something at your own risk
  • be sick and tired of (something)
  • be tired to death of (something)