Dignity

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Middle English: from Old French dignete, from Latin dignitas, from dignus ‘worthy’.

wiktionary

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From Middle English dignyte, from Old French dignité, from Latin dīgnitās(“worthiness, merit, dignity, grandeur, authority, rank, office”), from dīgnus(“worthy, appropriate”), from Proto-Italic *degnos, from Proto-Indo-European *dḱ-nos, from *deḱ-(“to take”). See also decus(“honor, esteem”) and decet(“it is fitting”). Cognate to deign. Doublet of dainty.

etymonline

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dignity (n.)

c. 1200, "state of being worthy," from Old French dignite "dignity, privilege, honor," from Latin dignitatem (nominative dignitas) "worthiness," from dignus "worth (n.), worthy, proper, fitting," from PIE *dek-no-, suffixed form of root *dek- "to take, accept."

From c. 1300 as "an elevated office, civil or ecclesiastical," also "honorable place or elevated rank." From late 14c. as "gravity of countenance."