inertion

noun

1. (uncountable)Lack of activity or exertion; inertness; quietude.

   “These vicissitudes of exertion and inertion of the arterial system constitute the paroxysms of remittent fever.”

2. (uncountable)The process of inerting; the use of an inert gas to reduce the risk of explosion.

   “nitrogen inertion”

   “One of the most important application areas of total flooding fire suppressants is explosion inertion. The inerting concentration of an agent is the concentration required to prevent unacceptable pressure increases in a premised fuel/air/agent mixture subjected to an ignition source.”