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swear (someone) to silence

idiom

: to make someone promise not to tell anyone else what was told to them
After divulging all the details, she swore us to silence on the matter.

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“Swear (someone) to silence.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/swear%20%28someone%29%20to%20silence. Accessed 27 Nov. 2025.

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