I have cut off the nations,.... Utterly destroyed them, as the Philistines, Moabites, Ethiopians, and Assyrians, as in the preceding chapters; all which were done before the coming of Christ in the flesh; and by which instances the Jews should have took warning, lest by their sins they should provoke the Lord to destroy their nation, city, and temple:their towers are desolate; built on their frontiers, or on the walls of their cities, to defend them; these were demolished, and laid waste, and of no use: or, "their corners" ; towers being usually built on the angles or corners of walls.
Some interpret this of their princes, nobles, and great men, who were destroyed; see Zec 10:4:I made their streets waste, that none passeth by; the streets of their cities, the houses being pulled down by the enemy, the rubbish of them lay in the streets, so that there was no passing for any; and indeed, the houses being demolished, the streets were no more in form:their cities are destroyed, so that there is no man, that there is none inhabitant; the houses being burnt with fire, or pulled down, and plundered of the goods and substance in them, and the people cut off by famine, pestilence, or sword; and the rest carried captive, there was scarce a man or inhabitant left; so general was the destruction.