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Supposedly vs. Supposably


[pros-per-uh s] /ˈprɒs pər əs/
having or characterized by financial success or good fortune; flourishing; successful:
a prosperous business.
well-to-do or well-off:
a prosperous family.
favorable or propitious.
Origin of prosperous
late Middle English
1400-50; late Middle English < Latin prosperus
Related forms
prosperously, adverb
prosperousness, noun
nonprosperous, adjective
nonprosperously, adverb
nonprosperousness, noun
overprosperous, adjective
overprosperously, adverb
overprosperousness, noun
pseudoprosperous, adjective
pseudoprosperously, adverb
quasi-prosperous, adjective
quasi-prosperously, adverb
superprosperous, adjective
unprosperous, adjective
unprosperously, adverb
unprosperousness, noun
1. thriving. 2. wealthy, rich. 3. fortunate, lucky, auspicious. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for prosperous
Historical Examples
  • prosperous peoples will not be morose; thanksgiving proclamations reflect the rosy hues of successful years.

    Child Life in Colonial Days Alice Morse Earle
  • prosperous or wretched, her destiny henceforth was linked with another.

    Other People's Money Emile Gaboriau
  • prosperous citizens in their best, peasants in gay holiday attire, streamed toward the Maximilian Platz.

    The Adventure of Princess Sylvia Mrs. C. N. Williamson
  • Protestants remembered the foul play at prosperous; the rebels swore to avenge the treachery at the Curragh.

    William Pitt and the Great War John Holland Rose
  • prosperous and adverse days appeared to visit the two communities almost in the same alternation.

  • prosperous communities sprang up in eastern Oregon and Washington.

  • Now two ships ran alongside the prosperous, and in spite of the valour of her crew, she was captured by the enemy.

  • prosperous Barcelona swarms with mechanics and artisans, and that is one reason why Barcelona is disorderly.

    Romantic Spain John Augustus O'Shea
  • prosperous and pleasant as it appeared on the surface, my life had its sad side for a young woman.

    Little Novels Wilkie Collins
  • prosperous old gentlemen pacing home, rotund in their buttoned-up coats, had clear drops at the end of their noses.

    The House with the Green Shutters George Douglas Brown
British Dictionary definitions for prosperous


flourishing; prospering
rich; affluent; wealthy
favourable or promising
Derived Forms
prosperously, adverb
prosperousness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for prosperous

early 15c., "tending to bring success," from prosper + -ous, or else from obsolete Middle French prospereus (15c.), from prosperer. The sense of "flourishing" is first recorded late 15c.

Online Etymology Dictionary, © 2010 Douglas Harper
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