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Webster's Dictionary (1865)

Slŭg'gish, a.

adjective

a. 1. Habitually idle and lazy; slothful; dull; inactive; as, a sluggish man.

  1. Slow; having little motion; as, a sluggish river or stream.
  2. Having no power to move one's self or itself; inert; inactive.

Matter is sluggish and inactive. Woodward. 4. Dull; stupid; tame; simple. “So sluggish a conceit.” Milton. Syn.— Inert; idle; lazy; slothful; indolent; dronish; slow; dull; drowsy; inactive. See INERT.