upon one's guard
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
One must be so circumspect—so much upon one's guard with all the world.
From Tales and Novels — Volume 05 by Maria Edgeworth
But when one is specially invited to be candid, one is naturally set upon one's guard.
From Doctor Thorne by Anthony Trollope
He had known in abundance women of courage, women of skill in dissimulation, but he remembered that when they were both beautiful and clever it was the part of wisdom to be upon one's guard.
From The Secret Witness by George Gibbs
It is well to be upon one's guard.
From Old Kensington by Miss Thackeray
One grew accustomed to see an enemy in every stranger, and to be upon one's guard before a neighbor as before some lurking traitor.
From The Malady of the Century by Max Simon Nordau
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