嫂子

1400年首次记录- 50;晚期中古英语在lawe系统;看到起源妹妹,在,法律¹;在中世纪英语in-lawe“法律”,即。,“a person within the regulation and protection of the law,” based on the prohibition by Roman civil law and, later, Christian canon law, of marriages within four degrees of consanguinity, i.e., up to and including first cousins