남의 눈을 피하여 몰래 또는 비밀리에 행동하는 방식으로
in a way that attempts to avoid notice or attention; secretively
예문:
"She surreptitiously checked her phone under the table during the boring lecture."
"The cat surreptitiously crept toward the bird sitting on the fence."
"He surreptitiously slipped a twenty-dollar bill into his daughter's pocket."