This creates a highly impenetrable layer, resistant to almost all small arms fire.

This was aggravated because there were impenetrable layers which the water could not escape through.

The ozone lay over the city in a noxious impenetrable layer.

Winter coats hung in an impenetrable layer, some of them reaching the floor.

It matted down to form an impenetrable layer, similar to a pile of whole sheets.

An optically impenetrable layer floating two kilometres above the ground.

The moisture which had accumulated from the melting snow froze into an impenetrable layer of ice.

The borderline of day and night stood out sharply on an impenetrable layer of clouds.

To get around this, the Air Force was ordered to cover its tracks with an impenetrable layer of fake paperwork.

And the Sword of Force, he felt sure, added another impenetrable layer of protection against demons.

It frequently lingers on tables sealed in its dish by an impenetrable layer of caramelized sugar.

These two precipitates combine to form an impenetrable layer on the reed, which prevent the reed from fully hydrating.

Most of Russia's ancient icons remained obscured under impenetrable layers of darkened drying oil or later "corrections" and revisions which often changed the original image.

When he did glance back briefly, he saw to his horror that there was nothing there-nothing but the same blackness that lay all about in heavy, impenetrable layers.

Instead of a ring of clear water around the base of the spire, the ship was hemmed by a thick, impenetrable layer of solid Juggler biomass.

A triple layer of new glass flake epoxy paint was applied to the bridge, similar to that used by the offshore oil industry, to create a virtually impenetrable layer.

On the "E" page, he came across an entry that had been scratched out entirely, obliterated by an impenetrable layer of black ink as if she'd crossed it out with a laundry marker or something.

Now in the framework below things were materializing as Arcot's flying thoughts arranged them-great tubes of cosmium with relux element-huge coils of relux conductors, insulated with microscopic but impenetrable layers of cosmium.

But by entwining PC software and data in an impenetrable layer of encryption, critics argue, the companies may be destroying the very openness that has been at the heart of computing in the three decades since the PC was introduced.

In one of those proud, stubborn gestures that reveals a hard core of integrity beneath a seemingly impenetrable layer of ego, Knight returned his $250,000 salary the week before his team's loss to Oklahoma in the semifinals of the league tournament.