The Hebrew word malkodeth means a trap, snare, or that which catches and holds. It comes from the root lakad (H3920), meaning to capture or seize. The word is used in Proverbs to describe how the wicked man is caught in his own devices, and more broadly, how sin ensnares the foolish.
The trap/snare imagery is pervasive in wisdom literature and the Psalms, reflecting the Old Testament's vivid awareness of the dangers lurking in sin and in the counsel of the wicked. Malkodeth captures the idea that sin is not merely disobedience but a trap — it catches and holds its victim. The profound theological irony in Proverbs is that the wicked man is ensnared by his own lips, his own plans, his own transgression. This is the biblical law of sowing and reaping applied to evil: those who set traps fall into them. The same principle applies to God's protection of the righteous — He keeps them from the snares of the wicked.