devilish

(r) in a playfully devilish manner
- the socialists are further handicapped if they believe that capitalists are not only wicked but also devilishly clever
devilishly,
(s) 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
diabolic, diabolical, mephistophelean, mephistophelian,
(s) playful in an appealingly bold way
- a roguish grin
rascally, roguish,

devilishly diabolic diabolical mephistophelean mephistophelian rascally roguish

devilise

devilise devilize

devilishly