IPA: /dɪˈmoʊniˌæk/
KK: /dɪˈmoʊniˌæk/
Relating to or resembling a devil; having qualities that are evil or fiendish.
The movie featured a demoniac character who caused chaos and fear.
A person who is believed to be controlled by a demon or evil spirit.
The villagers were afraid of the demoniac, thinking he was under the influence of dark forces.
Demoniac → It is formed from "daemon" (from Greek "daimon", meaning spirit or divine power) and the suffix "-iac" (meaning relating to or characterized by). The word "demoniac" refers to someone who is characterized by or relating to a demon or evil spirit.
Think of 'daemon' as a spirit and remember that 'demoniac' describes someone who is related to or characterized by a demon.