'Fortified' in the Bible

Look to see whether the land where they live is good or bad, and whether the cities in which they live are merely tents or if they're fortified.

However, the people living in the land are strong, and the cities are large and fortified. We also saw the descendants of Anak there.

Israel struck him with the sword and took possession of his land from the Arnon to the Jabbok, but only up to the Ammonite border, because it was fortified.

But we will arm ourselves and be ready to go ahead of the Israelites until we have brought them into their place. Meanwhile, our dependents will remain in the fortified cities because of the inhabitants of the land.

Beth-nimrah, and Beth-haran as fortified cities, and built sheepfolds.