Prosperity

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Middle English: from Old French prosperite, from Latin prosperitas, from prosperus ‘doing well’.

wiktionary

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prosper +‎  -ity, from Old French prosperitet, from Latin prosperitās. 

etymonline

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prosperity (n.)

"flourishing or thriving condition, good fortune, wealth, success in anything good or desirable," c. 1200, prosperite, from Old French prosprete (12c., Modern French prospérité) and directly from Latin prosperitatem (nominative prosperitas) "good fortune," from prosperus (see prosper).