'Fortified' in the Bible

But the people who live in the land are strong, and the cities are fortified (walled) and very large; moreover, we saw there the descendants of Anak [people of great stature and courage].

but we will be armed and ready to go to war before the [other tribes of the] Israelites, until we have brought them to their place, while our children live in the fortified cities because of the inhabitants of the land.

Beth-nimrah, and Beth-haran, fortified (walled) cities, and sheepfolds for sheep.