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.
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 Gibbs, George
One must be so circumspect—so much upon one's guard with all the world.
From Tales and Novels — Volume 05 by Edgeworth, Maria
Their preoccupation spread around them an atmosphere of "constraint and ennui; one had to be upon one's guard and to check oneself."
From The Ancient Regime by Durand, John
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 Nordau, Max Simon
Topt, to go out sharp, to be upon one’s guard.
