[1] : The Collaborative International Dictionary of English v.0.48

sluggish \slug"gish\, a.
   1. habitually idle and lazy; slothful; dull; inactive; as, a
      sluggish man.
      1913 webster

   2. slow; having little motion; as, a sluggish stream.
      1913 webster

   3. having no power to move one's self or itself; inert.
      1913 webster

            matter, being impotent, sluggish, and inactive, hath
            no power to stir or move itself.      --woodward.
      1913 webster

            and the sluggish land slumbers in utter neglect.
                                                  --longfellow.
      1913 webster

   4. characteristic of a sluggard; dull; stupid; tame; simple.
      r. "so sluggish a conceit." --milton.
      1913 webster

   syn: inert; idle; lazy; slothful; indolent; dronish; slow;
        dull; drowsy; inactive. see inert.
        1913 webster -- slug"gishly, adv. --
        slug"gishness, n.
        1913 webster
see also:
inert slug"gishly slug"gishness 

[2] : WordNet (r) 2.0

sluggish
     adj 1: with little movement; very slow; "a sluggish stream"
     2: of business not active or brisk; "business is dull or
        slow"; "a sluggish market" syn: dull, slow
     3: slow and apathetic; "she was fat and inert"; "a sluggish
        worker"; "a mind grown torpid in old age" syn: inert, torpid
see also:
dull slow inert torpid 

[3] : Moby Thesaurus II by Grady Ward, 1.0

215 moby thesaurus words for "sluggish":
   laodicean, micawberish, olympian, abeyant, affluent, aloof,
   ambling, apathetic, backward, benumbed, blah, blase, blunt,
   blunt-witted, bored, cataleptic, catatonic, cautious, circumspect,
   claudicant, comatose, confluent, costive, coursing, crawling,
   creeping, creeping like snail, dallying, dead, debilitated,
   decurrent, defluent, delaying, deliberate, desensitized, detached,
   diffluent, dilatory, dillydallying, dim, dim-witted, disinterested,
   dopey, dormant, down, dragging, draggy, droopy, drugged, dull,
   dull of mind, dull-headed, dull-pated, dull-witted, easy,
   easygoing, enervated, exanimate, faltering, fat-witted, flagging,
   flat, flowing, fluent, fluxional, fluxive, foot-dragging, foul,
   gentle, gradual, groggy, gross-headed, gulfy, gushing, halting,
   heartless, heavy, hebetudinous, hobbled, hobbling, hopeless, idle,
   in a stupor, in abeyance, in suspense, inactive, inanimate,
   indifferent, indolent, inert, insouciant, jaded, lackadaisical,
   laggard, lagging, languid, languorous, latent, lax, lazy, leaden,
   leisurely, lethargic, lifeless, limping, lingering, listless, logy,
   loitering, lumbering, lumpish, mazy, meandering, moderate,
   moribund, nonchalant, numb, numbed, obtuse, off, passive,
   phlegmatic, pluckless, poking, poky, pooped, pouring,
   procrastinating, procrastinative, procrastinatory, profluent,
   racing, relaxed, reluctant, remiss, resigned, running, rushing,
   sated, sauntering, sedentary, serpentine, shuffling, slack,
   sleeping, sleepy, slothful, slow, slow as death, slow as molasses,
   slow as slow, slow-crawling, slow-foot, slow-going, slow-legged,
   slow-moving, slow-paced, slow-poky, slow-running, slow-sailing,
   slow-stepped, slow-witted, slumbering, slumberous, smoldering,
   snail-paced, snaillike, somnolent, soporific, spiritless,
   spunkless, staggering, stagnant, stagnating, standing, static,
   stiff, stoic, streaming, strolling, stultified, stupefied, stupid,
   supine, surging, surgy, suspended, tame, tentative, thick-brained,
   thick-headed, thick-pated, thick-witted, thickskulled, tidal,
   toddling, torpid, tortoiselike, tottering, trudging, turtlelike,
   unaroused, uncaring, unconcerned, unhurried, uninterested,
   vegetable, vegetative, vortical, waddling, wan, weary, withdrawn,
   wooden, world-weary

Sluggish >> S Words
Sluggish, definition of term: Sluggish
sluggish_pag1.html