LACKADAISICAL

adj. 1 lethargic, languorous, languid, listless, lazy, sluggish, spiritless, idle, indolent, inactive, slothful, fainéant She's much too lackadaisical to go out and get a job 2 unenthusiastic, dull, apathetic, insouciant, uncaring, unconcerned, indifferent, blasé, cold, cool, lukewarm, tepid, unexcited, phlegmatic, unemotional, unexcitable, uninterested, unimpressed, uninspired, unmoved, pococurante: How can you explain the government's lackadaisical attitude towards the greenhouse effect?