Synonyms and related words :
Laodicean, Olympian, aloof, anemic, apathetic, asthenic, ataractic, benumbed, blah, blase, bloodless, bored, careless, casual, chicken, comatose, cool, cowardly, dead, debilitated, desensitized, detached, devil-may-care, disinterested, dispassionate, disregardful, distant, dopey, dormant, drooping, droopy, drugged, dull, easygoing, effete, enervated, etiolated, exanimate, faint, faintish, feeble, flabby, flaccid, floppy, gone, gutless, heartless, heavy, hebetudinous, heedless, hopeless, imbecile, impassive, impotent, in a stupor, inanimate, inattentive, incurious, indifferent, inert, inexcitable, insouciant, jaded, lackadaisical, languid, languishing, languorous, leaden, lethargic, lifeless, limber, limp, lukewarm, lumpish, lustless, marrowless, mindless, moribund, negligent, nerveless, nonchalant, numb, numbed, passive, perfunctory, phlegmatic, pithless, pluckless, pococurante, pooped, powerless, reckless, regardless, resigned, rubbery, sapless, sated, sinewless, slack, sleepy, slow, sluggish, soft, somnolent, soporific, spent, spineless, spiritless, spunkless, stagnant, stagnating, stoic, stolid, strengthless, stultified, stupefied, supine, tepid, thoughtless, torpid, turned-off, unanxious, uncaring, unconcerned, undiscriminating, unemotional, unenthusiastic, unhardened, uninquiring, uninterested, uninvolved, unmindful, unnerved, unsolicitous, unstrung, vegetable, vegetative, wan, weak, weakly, weary, withdrawn, world-weary