Secret and sly or sordid
English: backstair, backstairs, furtive
furtiveEnglish
furtive, backstair, backstairs, sneak(a), sneaky
Adjective
Marked by quiet and caution and secrecy, taking pains to avoid being observed
English: furtive, sneak(a), sneaky, stealthy, surreptitious
Bahasa: mencuri-curi