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"prosperous" is also used as a crossword clue. If that's what you saw, the answer is often affluent (8 letters).
Definitions
presaging or likely to bring good luck or a good outcome
Word origin
From Middle French prospereus, from Old French prosperer, from Latin prosperō (“to cause to succeed”), from Old Latin pro spere (“according to expectation”), from pro (“for”) + spes (“hope”).
Used in a sentence
“Trading Babe Ruth was far more prosperous for the Yankees than for the Red Sox.”
“He was raised in a very prosperous household.”
“He chose a prosperous lottery number that evening.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“financially thriving”10 letters
02“Doing well”10 letters
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