Middle English rubifyen, from Middle French rubifier, rubefier, modification (influenced by Middle French -fier -fy) of Latin rubefacere
15th century, in the meaning defined above
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“Rubify.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rubify. Accessed 8 Apr. 2026.
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