i Register
In some senses, inertia is marked as figuratively. Watch for register when choosing this word.
noun
The property of a body that resists any change to its uniform motion; equivalent to its mass.
In a person, unwillingness to take action.
Men […] have immense irresolution and inertia.
Not all the surviving veteran chiefs would actually fight. Some remained nominally in the resistance but in practice delayed at their bases, pretexting a lack of ammunition for their uncertain inertia.
Lack of activity; sluggishness; said especially of the uterus, when, in labour, its contractions have nearly or wholly ceased.