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]