savant (n.)youdaoicibaDictYouDict[savant 词源字典]
"one eminent for learning," 1719, from French savant "a learned man," noun use of adjective savant "learned, knowing," former present participle of savoir "to know," from Vulgar Latin *sapere, from Latin sapere "be wise" (see sapient).[savant etymology, savant origin, 英语词源]