Hypertext Webster Gateway: "impregnability"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Impregnability \Im*preg`na*bil"i*ty\, n.
The quality or state of being impregnable; invincibility.
From WordNet (r) 1.7 (wn)
impregnability
n : having the strength to withstand attack [syn: {invulnerability}]
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