Sentence examples for to be impregnable from inspiring English sources

Today's display cases have to be impregnable to thieves but easily accessible to those authorised to handle them.

For many years this type of cipher was thought to be impregnable and was known as le chiffre indéchiffrable, literally "the unbreakable cipher".

That combination is sufficient to wipe out majorities that were always assumed to be impregnable, and Scottish Labour's Westminster caucus is left shrivelling to just three MPs.

Fordow, Iran's second enrichment facility (its main one is at Natanz) which is buried deep within a mountain and thought to be impregnable to conventional air strikes, will cease all enrichment and be turned into a physics research centre.

Blitzkrieg tactics were used in the successful German invasions of Belgium, the Netherlands, and France in 1940, which saw audacious applications of air power and airborne infantry to overcome fixed fortifications that were believed by the defenders to be impregnable.

And Americans tend to get giddy over winners, especially underdogs who take the measure of a foe thought to be impregnable — in this case, the mighty forces carefully assembled over several years by the Clintons.

In addition to halting enrichment, officials said, Iran must agree to ship out its stockpiles of 20 percent uranium and to cease operations at an enrichment facility buried in a mountainside near the holy city of Qum, which Israel says could soon be impregnable to an airstrike.

"God willing, Baghdad will be impregnable.

Tora Bora seemed to be an impregnable fortress when Osama bin Laden controlled the high ground.

Valletta, today the nation's capital, was built after the lifting of that siege and was designed to be an impregnable fortress.

The club's collection is housed in what is said to be an impregnable fortress, reached through an inconspicuous steel door behind the Hall of Saurischian Dinosaurs.