'Fortify' in the Bible

He said to the people of Judah: "Let's build these cities and fortify them with walls, towers, and barred gates. The land remains ours because we have followed the Lord our God and he has made us secure on all sides." So they built the cities and prospered.

Then King Asa brought his entire army of Judah to carry away the building stones and the timber that Baasha had been using to surround Ramah, and he used those materials to fortify Geba and Mizpah.