Significados de inexpugnable refuge en inglés

One other flight for shelter; and then it is ended, and he has found an inexpugnable refuge.

This seemed to be an inexpugnable refuge, where we could live untroubled and learn to know each other.

Here it was, however, that they shamelessly broke down; as there's a flaw in every perfection this was the inexpugnable refuge of their egotism.