What is another word for "careless"?

Roget's Thesaurus (1911) lists these synonyms for "careless": about, all, aloof, anaphrodisia, anaphrodisiac, anorexia, anorexy, antaphrodisiac, anything, apathy, aught, bald, bland, care, childish, cold, coldness, colorless, cool, could, cucumber, desire, diffuse, disdain, dry, dull, earnestness, feeble, feebleness, fig, flatulent, for, frigid, half-hearted, have, inactivity, inappetency, inattention, indifference, indifferent.