go back on one's word

idiom

Definition of go back on one's word

: to break one's promise I told her I'd help. I can't go back on my word.

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“Go back on one's word.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/go%20back%20on%20one%27s%20word. Accessed 25 Nov. 2020.

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