inexpugnable

But there is no mistaking the real heartbreak and waste that are Hage’s material, or his outrage at the most costly, terrible and seemingly inexpugnable qualities of humanity.

Its lofty embattled walls, its bold, projecting, rounded towers that pierce the sky, strike the imagination and promise inexpugnable strength.

That might have been true, but on June 18, it was the Hanoverians who were inexpugnable.

Apple has shown, time and again, that they can do more with less, but have they let Samsung secure an inexpugnable market position?

"Pleasure somewhere, at some time, to some being or beings, is an inexpugnable element of the conception" of moral aim.