tranquilly
🇺🇸
/ˈtræŋkwɪli/
🇬🇧
/ˈtræŋkwɪli/
In a calm and serene manner, without disturbance.
She sat by the window, reading her book tranquilly.
彼女は窓際に座り、静かにその本を読んでいた。