Search Result for "inexpugnable": 
Wordnet 3.0

ADJECTIVE (1)

1. incapable of being overcome, challenged or refuted;
- Example: "an impregnable argument"
- Example: "impregnable self-confidence"
[syn: impregnable, inexpugnable]


The Collaborative International Dictionary of English v.0.48:

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]
WordNet (r) 3.0 (2006):

inexpugnable adj 1: incapable of being overcome, challenged or refuted; "an impregnable argument"; "impregnable self-confidence" [syn: impregnable, inexpugnable]