Outcast - as a wife put away by her husband (Isa 62:4, contrasted with Jer 30:12).
Zion - alluding to its Hebrew meaning, “dryness”; “sought after” by none, as would be the case with an arid region (Isa 62:12). The extremity of the people, so far from being an obstacle to, will be the chosen opportunity of, God’s grace.