さりげなく (translations)→ absently careless carelessly casual casually casualness covert covertly delicately discreetly effortlessly everyday inconspicuous innocently matter-of-factly nonchalantly restrained simply unobtrusively unselfconsciously vague
それとない (translations)→ subtle veiled
それとなく (translations)→ cautiously cunningly friendly generally gently little obliquely somehow subtly surreptitiously
気のきいた (translations)→ clever cleverly cute ingenious nice real solicitious swanky wise witty
慎重に (translations)→ careful carefully defensively deliberately measured patient slowly thoughtful thoughtfully warily