on guard against
idiom
: alert and ready to respond to possible danger, threats, problems, etc.
We need to be on guard against attack.
Examples of on guard against in a Sentence
Recent Examples on the Web
Some Central Florida water parks are shutting down, and farmers are on guard against frost that could threaten Florida’s fragile citrus industry.
—
Michael Butler, Miami Herald, 30 Jan. 2026
The main thing to be on guard against is inviting plant disease into the bush.
—David Beaulieu, The Spruce, 15 Jan. 2026
Nevertheless, investors are now on guard against the risks that could come from any unintended consequences from sour loans.
—Sarah Min, CNBC, 17 Oct. 2025
And of course Wendy tells Nibs the truth, putting them both on guard against the manipulations of their seemingly benevolent guardians.
—Alan Sepinwall, Rolling Stone, 9 Sep. 2025
See All Example Sentences for on guard against
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Michael Butler, Miami Herald, 30 Jan. 2026
The main thing to be on guard against is inviting plant disease into the bush.
—David Beaulieu, The Spruce, 15 Jan. 2026
Nevertheless, investors are now on guard against the risks that could come from any unintended consequences from sour loans.
—Sarah Min, CNBC, 17 Oct. 2025
And of course Wendy tells Nibs the truth, putting them both on guard against the manipulations of their seemingly benevolent guardians.
—Alan Sepinwall, Rolling Stone, 9 Sep. 2025
See All Example Sentences for on guard against
Cite this Entry
“On guard against.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%20guard%20against. Accessed 11 Feb. 2026.
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