impregnability
im-preg-na-bil-i-ty
noun
The quality of being impossible to capture, penetrate, or overcome.
"The fortress's impregnability was legendary."
Thesaurus
Synonyms: invulnerability
im-preg-na-bil-i-ty
The quality of being impossible to capture, penetrate, or overcome.
"The fortress's impregnability was legendary."
Synonyms: invulnerability