'Fortified' in the Bible

For, behold, I have made you this day a fortified city, and an iron pillar, and bronze walls, against the whole land, against the kings of Judah, against its princes, against its priests, and against the people of the land.

Declare in Judah, and publish in Jerusalem; and say, 'Blow the trumpet in the land!' Cry aloud and say, 'Assemble yourselves! Let us go into the fortified cities!'

They shall eat up your harvest, and your bread, [which] your sons and your daughters should eat. They shall eat up your flocks and your herds. They shall eat up your vines and your fig trees. They shall beat down your fortified cities, in which you trust, with the sword.

Why do we sit still? Assemble yourselves, and let us enter into the fortified cities, and let us be silent there; for Yahweh our God has put us to silence, and given us water of gall to drink, because we have sinned against Yahweh.

I will make you to this people a fortified bronze wall; and they shall fight against you, but they shall not prevail against you; for I am with you to save you and to deliver you, says Yahweh.

when the king of Babylon's army was fighting against Jerusalem, and against all the cities of Judah that were left, against Lachish and against Azekah; for these [alone] remained of the cities of Judah [as] fortified cities.