さりげなく (translations)→ 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 (translations)→ 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 (translations)→ cunningly friendly generally obliquely somehow subtly surreptitiously veiled
目立たないように (translations)→ unobtrusive