Synonyms and related words :
apathetic, ataractic, blanket, blase, careless, casual, devil-may-care, disinterested, dispassionate, disregardful, easygoing, general, heedless, imprudent, inattentive, incurious, indiscreet, indiscriminate, indiscriminating, indiscriminative, inexcitable, insensitive, insouciant, lackadaisical, listless, mindless, negligent, nonchalant, nonjudgmental, perfunctory, pococurante, promiscuous, reckless, regardless, sweeping, tactless, turned-off, unanxious, unconcerned, uncritical, uncriticizing, undemanding, undifferentiating, undiscreet, undiscriminated, undiscriminative, undistinguishing, unexacting, unfastidious, uninterested, unmeticulous, unmindful, unparticular, unselective, unsolicitous, unsubtle, untactful, wholesale