showing the cunning or ingenuity or wickedness typical of a devil;
"devilish schemes" "the cold calculation and diabolic art of some statesmen" "the diabolical expression on his face" "a mephistophelian glint in his eye"
playful in an appealingly bold way;
"a roguish grin"
Adverb:
in a playfully devilish manner;
"the socialists are further handicapped if they believe that capitalists are not only wicked but also devilishly clever"
