IPA: /ˌɛnɪˈædɪk/
KK: /ɛnˈniːədɪk/
Relating to a group of nine things or people.
The artist created an enneadic structure in her latest sculpture, representing nine different aspects of life.
Enneadic is formed from "ennea" (from Greek ἐννέα, meaning nine) and "-dic" (from Greek "dikos", meaning related to or pertaining to). The word refers to something that is related to or consists of nine parts or elements.
Think of the Greek word for nine, 'ennea', to remember that 'enneadic' relates to something made up of nine parts.
No commonly confused words.