What does "inertia" mean?

Inertia: Inertness; indisposition to motion, exertion, or action; want of energy; sluggishness. Men . . . have immense irresolution and inertia. Carlyle.

Additional senses

  1. 2.(Med.) Want of activity; sluggishness; -- said especially of the uterus, when, in labor, its contractions have nearly or wholly ceased. Center of inertia. (Mech.) See under Center.

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