Lethean, absent, absent-minded, absentminded, abstracted, airy, amnesiac, amnestic, bemused, blocked, careless, casual, converted, cursory, degage, disregardant, disregardful, distracted, dreaming, dreamy, easygoing, flippant, forgetting, free and easy, heedless, in the clouds, inattentive, inclined to forget, inconsiderate, indifferent, insouciant, lax, lazy, mindless, neglectful, negligent, oblivious, offhand, out of it, perfunctory, preoccupied, reckless, regardless, remiss, remote, repressed, respectless, slack, suppressed, tactless, thoughtless, unaccommodating, uncomplaisant, uncooperative, undiplomatic, unheedful, unheeding, unhelpful, unmindful, unobliging, unprepared, unready, unsolicitous, untactful, unthinking, unthoughtful, unwitting