inertness

noun3

1. •
   Lack of activity or exertion; habitual indisposition to action or motion

   • No life stirred. They alone moved through the vast inertness. They alone were alive, and they sought for other things that were alive in order that they might devour them and continue to live. — 1906
2. •
   Absence of the power of self-motion; inertia.
3. •
   Quality of being unreactive with other chemical compounds or elements.