The Oxford Thesaurus An A-Z Dictionary of Synonyms - artfuladj.

1) scheming, wily, sly, cunning, foxy, tricky, crafty, deceitful, underhand or underhanded, double-dealing, guileful, disingenuous: That artful fellow managed to sell me a completely useless gadget. 2) ingenious, clever, astute, shrewd, dexterous: She has practised her artful deceptions so long that nobody believes anything she says.