IPA: /dɪˈmɒnɪk/
KK: /dɪˈmɒnɪk/
Relating to or characteristic of evil spirits or demons; often used to describe something that is wicked or malevolent.
The movie featured a demonic creature that terrified the audience.
Demonic → It is formed from "daemon" (from Greek "daimon", meaning spirit or divine power) and the suffix "-ic" (meaning pertaining to). The word "demonic" refers to something that pertains to or is characteristic of a demon or evil spirit.
Think of a 'spirit' ('daemon') that is 'pertaining to' ('-ic') evil — that's why demonic describes something related to evil spirits.