And he discovered, &c.— And the barrier of Judah shall be laid open. Lowth. This might be rendered, "And he shall dismantle the fortified cities of Judah." The meaning of the metaphor is, that the fortified cities covered Judaea as with a veil. What the prophet here expresses figuratively, is expressed literally in the history, ch. Isaiah 36:1 and 2 Chronicles 32:1.
Related Commentaries of Isaiah 22:8
Isaiah 22:8
8 And he discovered the covering of Judah, and thou didst look in that day to the armour of the house of the forest.