Inert

Destitute of the power of moving itself, or of active resistance to motion; as, matter is inert.

Indisposed to move or act; very slow to act; sluggish; dull; inactive; indolent; lifeless.

Not having or manifesting active properties; not affecting other substances when brought in contact with them; powerless for an expected or desired effect.

having only a limited ability to react chemically; chemically inactive; "inert matter"; "an indifferent chemical in a reaction"