on one's honor
idiom
formal
—used to say that one promises to do something
On my honor, I will do my duty.
Dictionary Entries Near on one's honor
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“On one's honor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%20one%27s%20honor. Accessed 16 Apr. 2024.
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