Dignify

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late Middle English: from Old French dignefier, from late Latin dignificare, from Latin dignus ‘worthy’.

wiktionary

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From Old French dignifier, from Late Latin dignificare, from dignus(“worthy”) + ficare (in comp.), facere(“to make”). See deign and fact.

etymonline

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dignify (v.)

early 15c., dignifien, "invest with honor or dignity, exalt in rank or office," also "deem suitable," from Old French dignefiier, from Medieval Latin dignificare "make worthy," from Latin dignus "worthy, proper, fitting" (from PIE root *dek- "to take, accept") + -ficare, combining form of facere "to make, do" (from PIE root *dhe- "to set, put"). From mid-15c. as "confer honor upon, give celebrity to, make illustrious." Related: Dignified; dignifying.