Etymology
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bonanza (n.)

1844, western U.S. (1842 as a Mexican word in English), from American Spanish bonanza "a rich lode," originally "fair weather at sea, prosperity," from Vulgar Latin *bonacia, from Latin bonus "good" (see bonus). The Spanish word was transferred to mines, then, in English, to farms, then used generally for "a profitable thing."

updated on July 06, 2017

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