sneaky

adjectives

marked by deception

"achieved success in business only by underhand methods"

sneaky, underhand, underhanded

is derived from

is derived from

marked by quiet and caution and secrecy; taking pains to avoid being observed

"a furtive manner"; "a sneak attack"; "stealthy footsteps"; "a surreptitious glance at his watch"

furtive, sneak, sneaky, stealthy, surreptitious

is derived from

is derived from