DIABOLICAL

[di.a.bol.i.cal] or di.a.bol.ic adj [ME deabolik, fr. MF diabolique, fr. LL diabolicus, fr. diabolus] (14c): of, relating to, or characteristic of the devil: devilish -- di.a.bol.i.cal.ly adv -- di.a.bol.i.cal.ness n