Koh-i-noor (n.)youdaoicibaDictYouDict[Koh-i-noor 词源字典]
famous diamond, one of the British crown jewels after the annexation of Punjab in 1849, from Persian koh-i-nur, literally "mountain of light," from Persian koh "mountain" + Arabic nur "light."[Koh-i-noor etymology, Koh-i-noor origin, 英语词源]