こっそり の訳語→ creep furtively privately quietly sott-voce stealthily surreptitiously unperceived unseen
ことごとく の訳語→ all anywhere continually entirely every everything whatever whole
さりげなく の訳語→ absently careless carelessly casual casually casualness covert covertly delicately discreet effortlessly everyday inconspicuous innocently matter-of-factly nonchalantly restrained simply unobtrusively unselfconsciously vague
そっと の訳語→ calmly carefully cautiously ease furtive gently gingerly guardedly lightly little loosely politely quick quickly quiet secretly silently slight slowly softly stealthy tenderly tentative
それとなく の訳語→ cunningly friendly generally obliquely somehow subtly veiled
つつましく の訳語→ modest modestly pious reverently unassumingly
声を抑えて の訳語→ soft-voiced
適当な の訳語→ befitting convenient due lackluster opportune seemly