sneakily
🇺🇸
/ˈsniːkɪli/
🇬🇧
/ˈsniːkɪli/
adverb
R
in a way that is done quietly and secretly, often with bad intentions
The thief sneakily entered the house, trying not to make a sound.
盗賊は静かに家に侵入し、音を立てないように試みた。
translation
こっそり