abandon, careless abandon, carelessness, casualness, cursoriness, disregardfulness, easiness, hastiness, heedlessness, inconsiderateness, inconsideration, indifference, insouciance, lack of foresight, laziness, lethe, oblivion, obliviousness, offhandedness, perfunctoriness, recklessness, regardlessness, sprezzatura, tactlessness, thoughtlessness, unaccommodatingness, unheedfulness, unhelpfulness, unmindfulness, unobligingness, unpreparedness, unreadiness, unsolicitousness, unsolicitude, unthinkingness, unthoughtfulness