The Collaborative International Dictionary of English v.0.48:

Indolent \In"do*lent\, a. [Pref. in- not + L. dolens, -entis, p.
   pr. of dolere to feel pain: cf. F. indolent. See Dolorous.]
   [1913 Webster]
   1. Free from toil, pain, or trouble. [Obs.]
      [1913 Webster]

   2. Indulging in ease; avoiding labor and exertion; habitually
      idle; lazy; inactive; as, an indolent man.
      [1913 Webster]

            To waste long nights in indolent repose. --Pope.
      [1913 Webster]

   3. (Med.) Causing little or no pain or annoyance; as, an
      indolent tumor.

   Syn: Idle; lazy; slothful; sluggish; listless; inactive;
        inert. See Idle.
        [1913 Webster]

WordNet (r) 3.0 (2006):

indolent
    adj 1: disinclined to work or exertion; "faineant kings under
           whose rule the country languished"; "an indolent hanger-
           on"; "too lazy to wash the dishes"; "shiftless idle
           youth"; "slothful employees"; "the unemployed are not
           necessarily work-shy" [syn: faineant, indolent,
           lazy, otiose, slothful, work-shy]
    2: (of tumors, e.g.) slow to heal or develop and usually
       painless; "an indolent ulcer"; "leprosy is an indolent
       infectious disease"

Moby Thesaurus II by Grady Ward, 1.0:

93 Moby Thesaurus words for "indolent":
   ambling, bone-lazy, cadging, cautious, circumspect, claudicant,
   crawling, creeping, creeping like snail, deliberate, dilatory,
   do-nothing, doless, dronish, drony, easy, easygoing, ergophobic,
   faineant, faltering, flagging, foot-dragging, gentle,
   good-for-nothing, gradual, halting, hobbled, hobbling, idle,
   inactive, inert, laggard, languid, languorous, lax, lazy,
   lazybones, lazyboots, lazylegs, leisurely, lethargic, lie-abed,
   limping, listless, lumbering, moderate, nonaggressive, parasitic,
   poking, poky, procrastinative, relaxed, reluctant, remiss,
   sauntering, scrounging, shiftless, shuffling, slack, 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, slugabed,
   sluggish, snail-paced, snaillike, sponging, staggering, stagnant,
   strolling, tentative, toddling, torpid, tortoiselike, tottering,
   trudging, turtlelike, unenterprising, unhurried, waddling,
   work-shy