impregnable

Victory would surely put them in an impregnable qualifying position, but there was a steely confidence about coach Stojkovic when he addressed the media, along with Milenkovic, here on Monday.

Alcaraz was the outstanding player at Flushing Meadows, not dropping a set until the final, and was virtually impregnable on serve.

Germany forces occupied the Channel Islands from 1940 until 1945 and, under Adolf Hitler's orders, turned the the islands into an "impregnable fortress".

On the other hand, while politicians acknowledge the cost of the state pension triple lock is far higher than originally forecast, that policy seems to be utterly politically impregnable.

And while big majorities look impregnable, many MPs aren't feeling very secure.