köken: First recorded in 조선어사전 (Joseon-eo Sajeon, “Korean Language Dictionary”), published at 1938. According to some folk etymology, from English no touch. The Korea University dictionary assumes that it is compound of 노두 (露頭, nodu, “outcrop”) + 지 (地, ji, “land”)
gold mine (a mine for gold ore or metal) · gold mine (a very profitable economic venture) · gold mine (a plentiful stockpile of something sought-after)
köken: Borrowed from Spanish bonanza (“calm sea, fair weather, good luck, rich lode”), from Medieval Latin bonacia (“fair weather”), a blend of bonus (“good”) + malacia (“calm sea”).
Etimoloji
Borrowed from English bonanza, from Spanish bonanza, from Vulgar Latin *bonacia, alteration of malacia.