LISTLESS

adj. sluggish, lethargic, weary, weak, enervated, spent, languid, lifeless, heavy, phlegmatic, unemotional, impassive; unenthusiastic, indifferent, apathetic, unconcerned, lukewarm, tepid, cool, uncaring, insouciant; pococurante, Laodicean She was just over an illness and feeling quite listless