Words similar to impregnable

Example sentences for: impregnable

How can you use “impregnable” in a sentence? Here are some example sentences to help you improve your vocabulary:

The Moors were on the retreat, withdrawing to the almost impregnable mountain fortress area of Granada, where they held out until 1492.
Surrounded by a pair of precipitous ravines, the imposing walls of the citadel were some forty feet high and twenty feet thick, virtually impregnable.
King Prithvi Narayan Shah had difficulty conquering Kirtipur, whose site atop a ridge with two high points made it virtually impregnable.
This route sits against the old city walls, which were completed in 1785, and from here it is easy to see why the city was thought to be impregnable.
NYT columnist Thomas Friedman says that the U.S. airstrikes against Iraq last month rattled Saddam and showed that his system of control and intimidation is less impregnable than previously feared and weakened his support among his military protectors, the Republican Guards.