gracious favor freely shown by someone with power to someone without a claim on it, and the attractive quality that draws such favor out
Chen has one shape and two faces. Its first face is relational: the warm, willing favor that a stronger party turns toward a weaker one who has no right to demand it. A master shows it to a servant, a king to a subject, a host to a stranger, God to a worshipper. It lives in the eye of the giver, not in anything the receiver has earned, which is why the Bible's stock phrase is "to find favor in someone's eyes." Its second face is the charm or gracefulness that a person, a speech, or a thing possesses, the quality that makes others want to look on it kindly.
The two faces are connected, not separate words. The favor and the charm are the giving end and the drawing end of the same thing: the gracious person attracts the gracious response. The narrative books (Genesis through Esther) lean almost entirely on the first face, embedding the word in a polite formula of petition. The wisdom books, especially Proverbs, develop the second face, treating chen as an admired personal quality, even a fragile one that can charm without deserving to.
What the word does NOT yet carry is the later idea of favor shown to someone precisely because they are unworthy. The people who find favor in the Hebrew Bible are usually presented as in some way fitting: Noah is called righteous, Ruth is a worthy woman, Esther is beautiful. Chen names the lopsided shape of the relationship, the gift flowing downhill from the powerful to the powerless, rather than the moral failure of the one who receives it.