dæmonic

Adjective

demonic (comparative more demonic, superlative most demonic)

1. Pertaining to demons or evil spirits; demoniac.
   • Convinced that his uncle was a warlock, he rifled through his attic, looking for demonic artifacts.

   Synonyms:

   demonish, demonlike, demonly, cacodaemoniacal, daemonical, demoniac, demoniacal, demonical, devilish, diabolic

2. Pertaining to daemons in ancient Greek thought; concerning supernatural ‘genius’.
   • Aristotle concedes that the nature of the dream is indeed daemonic [translating dämonischer], but not divine – which might well reveal a profound meaning, if one could hit on the right translation.1999, Sigmund Freud, translated by Joyce Crick, The Interpretation of Dreams, section I
3. (broadly) Extremely cruel or evil; abhorrent or repugnant; diabolical.
   • Lifton goes on to argue that they can commit these demonic acts because they rationalize their behaviour. A whole array of rationalizations justified the murder of innocent men, women and children.2009, Peter Fleming, Stelios C. Zyglidopoulos, Charting Corporate Corruption: Agency, Structure and Escalation, page 40

   Synonyms:

   heartless, sadistic, baleful, malefic, foul, loathsome, barbarous, bowelless, brutal, compassionless