The Collaborative International Dictionary of English v.0.48:
Spiritless \Spir"it*less\, a.
1. Destitute of spirit; wanting animation; wanting
cheerfulness; dejected; depressed.
[1913 Webster]
2. Destitute of vigor; wanting life, courage, or fire.
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A men so faint, so spiritless,
So dull, so dead in lock, so woebegone. --Shak.
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3. Having no breath; extinct; dead. "The spiritless body."
--Greenhill.
[1913 Webster] -- Spir"it*less*ly, adv. --
Spir"it*less*ness, n.
[1913 Webster]