potentate (n.)youdaoicibaDictYouDict[potentate 词源字典]
c. 1400, from Old French potentat and directly from Late Latin potentatus "a ruler," also "political power," from Latin potentatus "might, power, rule, dominion," from potentem (nominative potens) "powerful" (see potent).[potentate etymology, potentate origin, 英语词源]