diabolical
adjective
1. showing the cunning or ingenuity or wickedness typical of a devil
- the cold calculation and diabolic art of some statesmen
- the diabolical expression on his face
Similar word(s): evil, devilish, diabolic, mephistophelean, mephistophelian
2. extremely evil or cruel; expressive of cruelty or befitting hell
- fires lit up a diabolic scene
- diabolical sorcerers under the influence of devils
Similar word(s): evil, demonic, diabolic, fiendish, hellish, infernal, satanic, unholy