on guard against

phrase

: alert and ready to respond to possible danger, threats, problems, etc.

We need to be on guard against attack.

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on guard

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“On guard against.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%20guard%20against. Accessed 13 Mar. 2026.

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on guard against

phrase

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