Found 2 items, similar to inexpugnable.
English → English (WordNet) Definition: inexpugnable inexpugnable adj : impossible to take by storm [syn: impregnable]
English → English (gcide) Definition: Inexpugnable Inexpugnable \In`ex*pug"na*ble\, a. [L. inexpugnabilis: cf. F. inexpugnable. See In- not, and Expugnable.] Incapable of being subdued by force; impregnable; unconquerable. --Burke. [1913 Webster] A fortress, inexpugnable by the arts of war. --Milman. [1913 Webster]