inertia

noun3

1. •
   The property of a body that resists any change to its uniform motion; equivalent to its mass.
2. •
   Lack of activity; sluggishness; said especially of the uterus, when, in labour, its contractions have nearly or wholly ceased.
3. •
   (figurative) In a person, unwillingness to take action.

   • Men […] have immense irresolution and inertia. — 1837