in arms
idiom
—often used in the brother/sister/comrade in arms to indicate one has helped to fight an enemy especially in a war
He and I were brothers in arms.
Cite this Entry
“In arms.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/in%20arms. Accessed 18 Jul. 2025.
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