someone's word is law

idiom

Definition of someone's word is law

used to say that other people must do what someone saysHe'll listen to suggestions, but in the end, his word is law.

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“Someone's word is law.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/someone%27s%20word%20is%20law. Accessed 19 Sep. 2020.

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