IdiomNatureFrench

Veiller au grain

Meaning: To stay alert for trouble.

Literally: To watch for the squall

Example: “Les marchés sont nerveux ; la banque préfère veiller au grain.” — The markets are jittery, so the bank is keeping its eyes peeled.

English equivalent: To keep one's eyes peeled

Other ways to say this

Origin: Un grain at sea is a sudden squall, not a seed, and a lookout watched for the darkening water that announced one. The phrase is about anticipation rather than caution.

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