demonic
adj 1: 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}, {diabolical}, {fiendish},
{hellish}, {infernal}, {satanic}, {unholy}]
Demonic \De*mo"nic\, a. [L. daemonicus, Gr. daimoniko`s.]
Of or pertaining to a demon or to demons; demoniac. "Demonic
ambushes." --Lowell.
[1913 Webster]