inert

“It shows these carbon-fluorine bonds are not as inert as we thought.”

The US "non-persistent" mines differ from Russia's as they become inert after a pre-set period of time - anywhere from four hours to two weeks.

In the nine years since the spill, the damaged pipeline was “evacuated, cleaned and preserved with inert nitrogen to maintain a corrosion-free state,” according to Steve Rusch, Sable’s vice president of environmental and regulatory affairs.

Gutierrez has maintained that she loaded Baldwin’s gun with what she believed were inert “dummy” rounds, unaware that a live bullet was in the chamber.

She studies how radioactive waste material can be made safe for extremely long-term storage, and is searching for the most stable, inert substance that nuclear waste could be "baked into".