'Betrothed' in the Bible

if evil in the eyes of her lord, so that he hath not betrothed her, then he hath let her be ransomed; to a strange people he hath not power to sell her, in his dealing treacherously with her.

And when a man doth entice a virgin who is not betrothed, and hath lain with her, he doth certainly endow her to himself for a wife;