Uz is a verb meaning to flee quickly to a place of safety, to seek refuge, to take shelter. It describes the action of running from danger toward a secure place. Related to oz (strength), the word implies that the place of refuge provides strength to the one who takes shelter there.
While uz appears rarely, its theology is enormous. Isaiah 10:31 uses it for flight from enemy attack; Jeremiah 4:6 for fleeing before catastrophe. But the spiritual dimension is primary: to flee to God is the highest act of faith. Proverbs 18:10 — 'The name of the LORD is a fortified tower; the righteous run to it and are safe.' The verb captures the urgency and intentionality of faith: running to God is not passive but active, not slow but urgent. The NT equivalent is 'fleeing to Christ' from the wrath to come.