しのびやかに の訳語→ insidiously stealthily
そっと の訳語→ calmly carefully cautiously covertly delicately discreetly ease furtive furtively gently gingerly guardedly lightly little loosely politely quick quickly quiet quietly silently slight slowly softly stealthy tenderly tentative
ひそかに の訳語→ mentally private privately surreptitiously unadvertised
人知れず の訳語→ secret undiscovered
内緒で の訳語→ semi-privately
内心 の訳語→ actually conscience enjoy enormously inside internal inward inwardly sneaking truth within
