bailiwick (n.)youdaoicibaDictYouDict[bailiwick 词源字典]
"district of a bailiff," early 15c., baillifwik, from bailiff (q.v.) + Middle English form of Old English wic "village" (see wick (n.2)). Figurative sense of "one's natural or proper sphere" is first recorded 1843.[bailiwick etymology, bailiwick origin, 英语词源]