The Inexpugnability of Fortresses: A Look at the Quality of Being Unassailable

Inexpugnability is a noun that refers to the quality of being impossible to attack or defend against. It is often used to describe fortifications, such as castles or other structures, that are designed to be impenetrable to enemy forces.

Examples of how inexpugnability might be used in a sentence include:

* The castle's inexpugnability was legendary, and it had never been breached in all its centuries of existence.
* The new fortress was designed with inexpugnability in mind, using the latest advances in military engineering to create an impenetrable barrier against enemy forces.
* Despite being heavily outnumbered, the defenders were able to hold off the attackers due to the inexpugnability of their position.