on one's guard

1. see under off guard.

Example Sentences

“Nature here is so strong that one has to be on one’s guard to not be absorbed by it,” wrote Dodge.

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Government regulation — and confiscatory taxation — neutered the animal spirits of capitalism; the world was a dangerous place, in which it paid to be on one’s guard; Britain was not finished; communism was an evil which threatened the world and stunted the life-chances of those who had to live under its heel.

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An Amusing Meeting in Orsera—Journey to Corfu—My Stay in Constantinople—Bonneval—My Return to Corfu—Madame F.—The False Prince—I Run Away from Corfu—My Frolics at Casopo—I Surrender My self a Prisoner—My Speedy Release and Triumph— My Success with Madame F. I affirm that a stupid servant is more dangerous than a bad one, and a much greater plague, for one can be on one's guard against a wicked person, but never against a fool.

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Watchful; vigilant or on one's guard against danger or difficulty.

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To be on one's guard; to be cautious; to take care; Ð commonly followed by of or lest before the thing that is to be avoided.

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