on your guard

• Expressão que significa estar atento, vigilante e preparado para um possível perigo, ameaça ou problema inesperado.

A phrase meaning to be alert, watchful, and prepared for potential danger, threats, or unexpected problems.

1. Be cautious and watchfulB2formal

   To be alert and ready to defend against danger, attack, or deception.

   Estar em guarda

   • You must be on your guard when walking alone at night.
   • The soldiers were on their guard for any enemy movement.
   • She was always on her guard against pickpockets in the market.