First of all, it provides impenetrable security, almost absolutely impenetrable.

It branched into a fractal network of smaller structures, absolutely impenetrable to the medical sensors.

It is even later shown to be absolutely impenetrable; not even Hyde's Texas Chainsaw can cut through it.

It had to be near a main highway, and it needed to be absolutely impenetrable by prowlers or sightseers.

The shield is absolutely impenetrable!

Oda's face was absolutely impenetrable, and Nangi cursed the lighting.

By 413, Liu Bobo finally resolved to build a capital-one that he wanted to make absolutely impenetrable.

I wanted to go to her and lift my hand and touch the skin which seemed absolutely impenetrable but which would break suddenly like the most fragile crust.

His face was very still, absolutely impenetrable.

And the thoughts absolutely impenetrable.