warn about

To strongly advise someone not to do something because it is dangerous, harmful, or unwise.

• 🇫🇷Mettre en garde quelqu'un contre un danger, un risque ou une action déconseillée, en lui conseillant fortement de l'éviter.

1. Advising strongly against a specific action B2 formal

   Cautioning someone with emphasis to avoid a particular deed or behavior due to perceived negative consequences.

   • The doctor warned against mixing those two medications.
   • Officials warned against traveling to the war zone.
   • She warned her friends against trusting the deal.

   🇫🇷mettre en garde contre

2. Advising someone strongly against a course of action B2 informal

   Giving a cautionary recommendation to deter a person from doing something deemed harmful, foolish, or dangerous.

   • I'd warn anyone about buying a used car without a thorough check.
   • They were warned about walking alone in that neighborhood at night.
   • His colleagues warned him about arguing with the boss.

   🇫🇷mettre en garde contre