Lewis & Short

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prospĕrĭtas, ātis, f. [prosper],

  1. I. desirable condition, good fortune, success, prosperity (rare but good prose): vitae, Cic. N. D. 3, 36, 86: honestarum rerum, id. Fragm. ap. Amm. 21, 16, 13: tantā prosperitate usus est valetudinis, ut, etc., such a desirable state of health, such full health, Nep. Att. 21, 1.
    In plur.: improborum prosperitates secundaeque res, Cic. N. D. 3, 36, 88: ventorum, App. M. 11, p. 270, 21: summarum rerum, Amm. 17, 4, 6: currentes ex voto, id. 22, 8, 6; Vulg. 2 Macc. 14, 14.
  2. II. Joy, approbation: quod est prosperitatis indicium plenum, Amm. 15, 8, 15.