#1 sneaky s. [underhand, underhanded] marked by deception; "achieved success in business only by underhand methods". wn
#2 sneaky s. [furtive, sneak, stealthy, surreptitious] 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". wn
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