masterful (adj.)youdaoicibaDictYouDict[masterful 词源字典]
c. 1300, "fond of being a master," from master (n.) + -ful. Sense evolved through "having capabilities to command" (c. 1400) to "characterized by a master's skill" (1610s). Related: Masterfully.[masterful etymology, masterful origin, 英语词源]