Job 18:9 - Matthew Poole's English Annotations on the Holy Bible

Shall take the by the heel, i.e. take fast hold of him, so as to keep him in those distresses; and when he is insnared the robber shall come upon him, and take, and spoil, or kill him. Or, the horrible or terrible man; the huntsman, that laid the snare for him. A metaphor from those who hunt for wild beasts, who first lay snares for them, and then seize upon them in the snares.