devilish (
http://definr.com/devilish)
adj 1: 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" [syn:
diabolic,
diabolical,
mephistophelian,
mephistophelean]
2: playful in an appealingly bold way; "a roguish grin" [syn:
rascally,
roguish]
adv : in a playfully devilish manner; "the socialists are further
handicapped if they believe that capitalists are not
only wicked but also devilishly clever" [syn:
devilishly]