bonanza

[ buh-nan-zuh, boh- ]
/ bəˈnæn zə, boʊ- /

noun

a rich mass of ore, as found in mining.
a source of great and sudden wealth or luck; a spectacular windfall: The play proved to be a bonanza for its lucky backers.

Origin of bonanza

1835–45, Americanism; < Spanish: literally, smooth sea (hence, good luck, rich vein of ore), nasalized variant of Medieval Latin bonacia, equivalent to Latin bon(us) good + (mal)acia calm sea < Greek malakía softness (malak(ós) soft + -ia -ia)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bonanza

British Dictionary definitions for bonanza

bonanza

/ (bəˈnænzə) /

noun

a source, usually sudden and unexpected, of luck or wealth
US and Canadian a mine or vein rich in ore

Word Origin for bonanza

C19: from Spanish, literally: calm sea, hence, good luck, from Medieval Latin bonacia, from Latin bonus good + malacia dead calm, from Greek malakia softness
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

Word Origin and History for bonanza

bonanza


n.

1844, American English, from Spanish bonanza "a rich lode," originally "fair weather at sea, prosperity," from Vulgar Latin *bonacia, from Latin bonus "good" (see bene-).

Online Etymology Dictionary, © 2010 Douglas Harper