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on guard

English

  1. 🔊 vigilant
    “on guard against con artists”

Similar words

on one's guard(p) upon one's guard(p) on your guard argus-eyed all ears all eyes at bay aux abois aux aguets canny careful cautious circumspect custodial defensively deliberate discreet eagle-eyed gingerly guarded hawk-eyed heedful hesitant in defense