あっさり の訳語→ brightly carelessly casual dryly easily entirely freely handsomely impatiently just matter-of-factly off-hand quickly readiness short shortly simply succinctly thinly unceremoniously willing
さりげなく の訳語→ absently careless casually casualness covert covertly delicately discreet discreetly everyday inconspicuous innocently nonchalantly restrained unobtrusively unselfconsciously vague
なんとなく の訳語→ actually bit certain connotation distinct general imprecisely inexplicably intuitively little mildly moderately rather really seem somehow somewhat vaguely