surreptitious
🇺🇸
/ˌsɜːrəpˈtɪʃəs/
🇬🇧
/ˌsʌrəpˈtɪʃəs/
done in a hidden way, without wanting to be noticed
He took a surreptitious look around to make sure no one was watching.
그는 아무도 보고 있지 않은지 확인하기 위해 몰래 주위를 둘러보았다.