impregnable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Alcatraz island - nicknamed "the Rock" because it was regarded as an impregnable fortress - is home to the shuttered federal penitentiary that housed some of the most dangerous criminals in the US.

From BBC • Jan. 30, 2026

In theory that threatens Apple’s impregnable walled garden.

From The Wall Street Journal • Jan. 2, 2026

Once impregnable, touring sides have won more matches at the Gabba than any other Australia venue since 2021.

From BBC • Dec. 1, 2025

“Some criminals have understood that museums are not impregnable cultural fortresses,” said Pierre Noual, a French lawyer specializing in cultural heritage law.

From The Wall Street Journal • Nov. 13, 2025

“If Storm’s End is so impregnable, how do you mean to take it?” asked Malo.

From "A Dance with Dragons" by George R. R. Martin