Furtive
adjective
marked by quiet and caution and secrecy; taking pains to avoid being observed
“a furtive manner”
Similar: sneak, sneaky, stealthy, surreptitious
adjective
secret and sly or sordid; ; - A.L.Guerard
“backstairs gossip”
Similar: backstair, backstairs
Word family
furtiveness · furtively