inexcitable

Inexcitable \In`ex*cit"a*ble\, a. [L. inexcitabilis from which
   one cannot be aroused. See {In-} not, and {Excite}.]
   Not susceptible of excitement; dull; lifeless; torpid.
   [1913 Webster]
    

177 Moby Thesaurus words for "inexcitable":
      affectless, anesthetized, apathetic, arctic, arid, ataractic,
      autistic, aweless, barren, blah, blank, blase, bloodless, blunt,
      bovine, calm, careless, casual, catatonic, characterless, chill,
      chilly, cold, cold as charity, cold-blooded, coldhearted,
      colorless, composed, cool, coolheaded, dead, devil-may-care,
      disinterested, dismal, dispassionate, disregardful, draggy,
      drearisome, dreary, drugged, dry, dryasdust, dull, dusty,
      easygoing, effete, elephantine, emotionally dead, emotionless,
      empty, etiolated, even-tempered, expected, expecting, fade, flat,
      frigid, frosted, frosty, frozen, heartless, heavy, heedless,
      ho-hum, hollow, icy, immovable, impassible, impassive,
      imperturbable, inane, inattentive, incurious, inirritable, insipid,
      insouciant, insusceptible, jejune, lackadaisical, leaden, lifeless,
      listless, low-spirited, mindless, negligent, nerveless, nonchalant,
      nonemotional, objective, obtuse, out of touch, pale, pallid,
      passionless, patient, pedestrian, perfunctory, plodding,
      pococurante, pointless, poky, ponderous, reckless, regardless,
      relaxed, rock-steady, self-absorbed, slow, solemn, soulless,
      spiritless, steady, steady-handed, steady-nerved, steel-nerved,
      sterile, stiff, stodgy, stoic, stolid, strong-nerved, stuffy,
      superficial, tasteless, tedious, turned-off, unaffectionate,
      unamazed, unanxious, unastonished, unastounded, unawed,
      unbewildered, unblenching, unblinking, unconcerned, undazed,
      undazzled, undiscriminating, undisturbable, undumbfounded,
      unemotional, unfaltering, unfeeling, unflappable, unflinching,
      unimpassioned, unimpressed, unimpressionable, uninterested,
      unirritable, unlively, unloving, unmarveling, unmindful, unmoved,
      unnervous, unpassionate, unquivering, unresponding, unresponsive,
      unshaken, unshaky, unshrinking, unsolicitous, unstrained,
      unsurprised, unsusceptible, unsympathetic, untouchable,
      untremulous, unwavering, unwondering, vapid, without a tremor,
      wonderless, wooden