Adjective

1. crafty, cunning, dodgy, foxy, guileful, knavish, slick, sly, tricksy, tricky, wily, artful (vs. artless)

usage: marked by skill in deception; "cunning men often pass for wise"; "deep political machinations"; "a foxy scheme"; "a slick evasive answer"; "sly as a fox"; "tricky Dick"; "a wily old attorney"

See also: wily (Dictionary)