さりげなく (translations)→ absently careless carelessly casual casually casualness covert covertly delicately discreet discreetly effortlessly everyday inconspicuous innocently matter-of-factly restrained simply unobtrusively unselfconsciously vague
事もなげに (translations)→ coolly easily ever-ready
無造作に (translations)→ heedlessly just loosely offhandedly unceremoniously