inexpugnable

Heroic Vacuum; inexpugnable, while purse and present condition of society hold out; curable by no hellebore.

For here again our inexpugnable hypocrisy comes in and leads us down to perdition even in our prayers.

It will be seen in the crevice of what quibble that gentleman sought refuge and sits inexpugnable.

Nicky knew what he had been sent for, and to all his aunt's assaults and manoeuvres he presented an inexpugnable front.