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Middle English, from un- entry 1 + thankful
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Cite this Entry
“Unthankful.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unthankful. Accessed 23 Oct. 2021.
More from Merriam-Webster on unthankful
Nglish: Translation of unthankful for Spanish Speakers
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