Impenetrability [noun]

If on the contrary they join impenetrability to the three dimensions, they are no more talking about something simple.

A sudden shadow passed over his face, giving it a strange pallor and impenetrability.

Sydney Smith's aspersions upon the impenetrability of the Scotch skull are well known, though their justice may be questioned.

Nothing could help it on better with the public than the impenetrability of the secret attached to it.

You wrap yourself in impenetrability and expect the world to be clairvoyant.

And he certainly chose that evening to prove his impenetrability.

I felt the impenetrability of a secretly cherished hope, whenever I looked at her.

In this they strongly resemble the salves and other means by which people in Europe sought to obtain "magical impenetrability."

He looked back with baffling, inscrutable eyes, his dark face masklike in its impenetrability.

Its impenetrability was tried, and it resisted all thrusts of the dagger, and several balls were turned aside by it.