impenetrability

[ im-pen-i-truh-bil-i-tee, im-pen- ]

noun

the state or quality of being impenetrable.
Physics. that property of matter by virtue of which two bodies cannot occupy the same space simultaneously.

Origin of impenetrability

First recorded in 1655–65; impenetr(able) + -ability

If on the contrary they join impenetrability to the three dimensions, they are no more talking about something simple.
Plotinos: Complete Works, v. 3 | Plotinos (Plotinus)
A sudden shadow passed over his face, giving it a strange pallor and impenetrability.
The Sorrows of Satan | Marie Corelli
Sydney Smith's aspersions upon the impenetrability of the Scotch skull are well known, though their justice may be questioned.
Thirty | Howard Vincent O'Brien
Nothing could help it on better with the public than the impenetrability of the secret attached to it.
The Real Thing and Other Tales | Henry James
You wrap yourself in impenetrability and expect the world to be clairvoyant.
Edgar Saltus: The Man | Marie Saltus

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