Webster's Revised Unabridged Dictionary · 1913

Inert

Inert , adjective

[Latin iners, inertis, unskilled, idle; pref. in- + ars art: compare French inerte. See Art.]

1.
Destitute of the power of moving itself, or of active resistance to motion; as, matter is inert.
2.
Indisposed to move or act; very slow to act; sluggish; dull; inactive; indolent; lifeless.
The inert and desponding party of the court. — Macaulay
It present becomes extravagant, then imbecile, and at length utterly inert. — I. Taylor
3.
Not having or manifesting active properties; not affecting other substances when brought in contact with them; powerless for an expected or desired effect; as, the noble gases are chemically inert.
Even the favored isles... Can boast but little virtue; and, inert Through plenty, lose in morals what they gain In manners -- victims of luxurious ease. — Cowper
Doomed to lose four months in inactive obscurity. — Johnson
Sluggish Idleness, the nurse of sin, Upon a slothful ass he chose to ride. — Spenser