forewarn about

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?

Name	Pronounced	Usage
Fryderyk	fri-DER-ik	Polish
Priscilla	[pri'silə]
Jimmy	JIM-ee	English
Sewell	['su:əl]
Aatu	AH:-too	Finnish
Elias	[i'laiəs]