What are the characteristics of a promiscuous woman (baghiy), mentioned in the verse: "O sister of Aaron, your father was not a man of evil, nor was your mother unchaste (baghiy)?"

Al-baghy (the harlot) is the fornicatress. What the fornicatress takes for fornication is metaphorically called a dower (mahr). The plural of baghy is baghaya, and al-bigha' is fornication and debauchery.