SudanyoudaoicibaDictYouDict[Sudan 词源字典]
1842, from Arabic Bilad-al-sudan, literally "country of the blacks" (originally the stretch of Africa between the Sahara and the equator), from sud, plural of aswad (fem. sauda) "black." In early use also Soudan, from French. Related: Sudanese.[Sudan etymology, Sudan origin, 英语词源]