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
Singapore was considered impregnable, but it wasn’t prepared for an attack from the mainland, and its 60,000-strong garrison surrendered on Feb. 8, 1942, the worst defeat in British history.
From The Wall Street Journal • Oct. 27, 2025
High-flying Crystal Palace are the only side to rival City's attacking threat, while Newcastle are living up to their name by being almost as impregnable at the back as Arsenal.
From BBC • Oct. 15, 2025
It was an expedition like that of an army without weapons against an impregnable fortress, an army which at the same time had its hands tied behind its back.
From "The Once and Future King" by T. H. White
Vocabulary lists containing impregnable
Power Suffix: -able
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1984
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"Joyas Voladoras" by Brian Doyle
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