Hebrew poetry as in Job rhymes in meanings... not sounds as most Western poetry does. It repeats itself for emphasis.
So take the two previous verses
Even as I have seen, they that plow iniquity, and sow wickedness, reap the same. By the blast of God they perish, and by the breath of his nostrils are they consumed.
(Job 4:8-9)
and couple them with
The roaring of the lion, and the voice of the fierce lion, and the teeth of the young lions, are broken. The old lion perisheth for lack of prey, and the stout lion's whelps are scattered abroad.
(Job 4:10-11)
and it becomes evident Eliphaz is (falsely) charging Job to be in iniquity and though Job may be strong in his rebellion God will break his powerful pride.