evil
unpleasant
Acherontic
Draconian
Lethean
Mephistophelian
Plutonian
Plutonic
Stygian
Tartarean
anarchic
angry
animal
anthropophagous
atrocious
awful
barbaric
barbarous
beastly
bestial
bloodthirsty
bloody
bloody-minded
blustering
blusterous
blustery
brutal
brutalized
brute
brutish
cannibalistic
chaotic
chthonian
chthonic
cruel
cruel-hearted
cursed
damnable
demoniac
demoniacal
demonic
demonish
demonlike
detestable
devil-like
devilish
diabolic
diabolical
execrable
fell
feral
fiendish
frightful
gruesome
heavenly
horrid
infernal
inhuman
murderous
unbearable
unearthly
unending
unholy
unrelenting
unspeakable
embellish
relish