'Inaccessible' in the Bible

There was no city that was inaccessible to us, from Aroer on the rim of the Arnon Valley, along with the city in the valley, even as far as Gilead. The Lord our God gave everything to us.

Wisdom is inaccessible to a fool;he does not open his mouth at the gate.

For He has humbled those who live in lofty places—an inaccessible city.He brings it down; He brings it down to the ground;He throws it to the dust.