diabolical (
http://definr.com/diabolical)
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:
devilish,
diabolic,
mephistophelian,
mephistophelean]
2: extremely evil or cruel; expressive of cruelty or befitting
hell; "something demonic in him--something that could be
cruel"; "fires lit up a diabolic scene"; "diabolical
sorcerers under the influence of devils"; "a fiendish
despot"; "hellish torture"; "infernal instruments of war";
"satanic cruelty"; "unholy grimaces" [syn:
demonic,
diabolic,
fiendish,
hellish,
infernal,
satanic,
unholy]