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 Edgeworth, Maria

Topt, to go out sharp, to be upon one’s guard.

From The Surprising Adventures of Bampfylde Moore Carew King of the Beggars; containing his Life, a Dictionary of the Cant Language, and many Entertaining Particulars of that Extraordinary Man by Unknown

If one don't mind what one's about, one is blown up in a moment; and to be always upon one's guard, is worse than ruin itself.

From The Wanderer (Volume 3 of 5) or, Female Difficulties by Burney, Fanny

Still, one must be always upon one's guard!

From Up the Hill and Over by Mackay, Isabel Ecclestone

But when one is specially invited to be candid, one is naturally set upon one's guard.

From Doctor Thorne by Trollope, Anthony