inactivity

Inactivity, n.

Etymology: [Cf. F. inactivité.]

1. The state or quality of being inactive; inertness; as, the inactivity of matter.

2. Idleness; habitual indisposition to action or exertion; want of energy; sluggishness. The gloomy inactivity of despair. Cook.

Shades of meaning

Fernald lists inactivity only as an antonym, under act, exercise.

He lists it without comment; the entries above explain its neighbors.

none given