A substance that does not react chemically.
"The inert gas inside the light bulb prevents the filament from oxidizing and burning out quickly."
To fill with an inert gas to reduce the risk of explosion.
"The engineers pumped nitrogen into the fuel tanks to keep them inert and prevent any accidental explosions during transport."
unable to move or resist motion
"The heavy crate remained completely inert on the slippery floor, refusing to budge even when I pushed it hard."
having only a limited ability to react chemically; chemically inactive
"inert matter"
"an indifferent chemical in a reaction"
Unable to move or act; inanimate.
"The heavy rock remained completely inert, refusing to budge even when the wind howled against it."