impregnability

English

Noun

impregnability (uncountable)

1. The quality or state of being impregnable; invincibility.

References

• “impregnability”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.
• “impregnability”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.