Pertaining to Hades or hell.
Of, or relating to the geological eon.
The Hadean eon; part of the Precambrian supereon, spanning from around 4.6 to 4 billion years ago.
Extremely cruel or evil; abhorrent or repugnant.
Pertaining to dæmons in ancient Greek thought; concerning supernatural ‘genius’.
Pertaining to demons or evil spirits; demoniac.