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 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
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 John Durand
To stand upon one’s guard against Death exasperates her malice and protracts our sufferings.
From Imaginary Conversations and Poems A Selection by Walter Savage Landor
One must be so circumspect—so much upon one's guard with all the world.
From Tales and Novels — Volume 05 by Maria Edgeworth
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 Fanny Burney
