inertness

Noun

inertness (usually uncountable, plural inertnesses)

1. (usually) 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, Jack London, “The Battle of the Fangs”, in White Fang, pages 49-63

   Synonyms:

   sluggishness, apathy, insensibility

2. (usually) Absence of the power of self-motion; inertia.
3. (usually) Quality of being unreactive with other chemical compounds or elements.