- Pertaining to the devil; resembling, or appropriate, or
appropriate to, the devil; devilish; infernal; impious; atrocious;
nefarious; outrageously wicked; as, a diabolic or diabolical temper or
act.
Meaning of 'diabolical' (Princeton's WordNet)
1 . diabolical
[ s]
Meaning (1): - extremely evil or cruel; expressive of cruelty or befitting hell
Example in sentence:
a fiendish despot;
diabolical sorcerers under the influence of devils;
fires lit up a diabolic scene;
hellish torture;
infernal instruments of war;
satanic cruelty;
something demonic in him--something that could be cruel;
unholy grimaces
Meaning (2): - showing the cunning or ingenuity or wickedness typical of a devil
Example in sentence:
a mephistophelian glint in his eye;
devilish schemes;
the cold calculation and diabolic art of some statesmen;