idiomC2to becarefultoavoidbeingtrickedor getting into adangeroussituation:警惕,提防;警戒You always have to be onyourguardagainstpickpockets.你得时时提防扒手。SMART Vocabulary: related words and phrasesPaying attention and being careful
attention span
attentiveness
be good, and if you can't be good, be carefulidiom
cared-for
cautious
guard
handle/treatsomeonewith kid glovesidiom
hang
hang on/uponsomething
have a careidiom
have/keepyourear to the groundidiom
religion
revolve aroundsomeone/something
safety
safety firstidiom
see pastsomething
singleness
sit
zero
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See more results ?(Definition ofbe on (your) guardfrom theCambridge Advanced Learner's Dictionary & Thesaurus? Cambridge University Press)#https://dictionary.cambridge.org//dictionary/english/be-on-guard##