master (v.)youdaoicibaDictYouDict[master 词源字典]
early 13c., "to get the better of," from master (n.) and also from Old French maistrier, from Medieval Latin magistrare. Meaning "to reduce to subjugation" is early 15c.; that of "to acquire complete knowledge" is from 1740s. Related: Mastered; mastering.[master etymology, master origin, 英语词源]
overmaster (v.)youdaoicibaDictYouDict
mid-14c., from over- + master (v.). Related: Overmastered; overmastering.