Surfaces are typically made of an inert material like slate.

The inert material engulfs the foreign substance in contact with it.

If no leaks are found, the tank can be filled with an inert material.

Glass is a hard, inert material that can be recycled over and over again.

It's just inert material, the same as the dust kicked up by their feet.

It may be empty or filled with inert material.

Until now this inert material could only be used in applications that do not require vulcanization.

Mixing the inert material into the bowl, he congratulated himself on his intelligence.

Metal was hard to work with because it was an inert material.

He probes the inside with his perceptions, but only inert material rests there.