devilish, diabolic, diabolical, mephistophelian, mephistophelean -- (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")
devilish, rascally, roguish -- (playful in an appealingly bold way; "a roguish grin")
Overview of adv devilish
The adv devilish has 1 sense
devilishly, devilish -- (in a playfully devilish manner; "the socialists are further handicapped if they believe that capitalists are not only wicked but also devilishly clever")
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