さりげなく の訳語→ absently careless carelessly casual casually casualness covert delicately discreet discreetly effortlessly everyday inconspicuous innocently matter-of-factly nonchalantly restrained simply unobtrusively unselfconsciously vague
そっと の訳語→ calmly carefully cautiously ease furtive furtively gently gingerly guardedly lightly little loosely politely quick quickly quiet quietly secretly silently slight slowly softly stealthily stealthy tenderly tentative
それとなく の訳語→ cunningly friendly generally obliquely somehow subtly surreptitiously veiled
目立たないように の訳語→ unobtrusive