bylaw (n.)youdaoicibaDictYouDict[bylaw 词源字典]
late 13c., bilage "local ordinance," from Old Norse or Old Danish bi-lagu "town law," from byr "place where people dwell, town, village," from bua "to dwell" (see bower) + lagu "law" (see law). So, a local law pertaining to local residents, or rule of a corporation or association. Sense influenced by by.[bylaw etymology, bylaw origin, 英语词源]