demoniacal

adj

1. Pertaining to, characteristic of, or produced by a demon or evil spirit; devilish, demonic, fiendish.

   “sarcastic, demoniacal laughter”

   “Rebecca laughed in her face, with a horrid sarcastic demoniacal laughter, that almost sent the schoolmistress into fits.”

   “'What do you think of that, Job?' I asked of our retainer, who was sitting on the edge of the boat, trying to get as much sunshine as possible, and generally looking uncommonly wretched, and I pointed to the fiery and demoniacal head.”

   “The spectator feels almost persuaded that he is witnessing some unearthly demoniacal orgie.”

   “They knew what it meant; even Joan had heard the cry of the lone wolf hunting in the lean time of winter, and of all things sad, all things lonely, all things demoniacal, the howl of a wolf stands alone.”