Significado de “be on (your) guard” - Diccionario Inglés

british dictionary

Significado de "be on (your) guard" - Diccionario Inglés

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be on (your) guard

C2 to be careful to avoid being tricked or getting into a dangerous situation:

You always have to be on your guard against pickpockets.

(Definition of “be on (your) guard” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)