Associate yourselves. Make friendships.
people. nations.
gird yourselves. Note the Figure of speech Repetitio for emphasis. Occurs in "former" portion here only, and in the "latter" portion only in Isaiah 45:5 with Isaiah 50:11. App-79.
Related Commentaries of Isaiah 8:9
Isaiah 8:9
9 Associate yourselves, O ye people, and ye shall be broken in pieces; and give ear, all ye of far countries: gird yourselves, and ye shall be broken in pieces; gird yourselves, and ye shall be broken in pieces.