Synonyms of mephistophelian

1 Syllable
bad
2 Syllables
brutish, evil, hellborn, hellish, cursed, fiendish
3 Syllables
inhuman, villainous, diabolic, damnable, infernal, demoniac, demonic, atrocious, devilish, satanic, accursed, nefarious
4 Syllables
diabolical, detestable, unhallowed, cloven-footed, iniquitous, serpentine, execrable