IPA: /ˌɪn.təˈlɪdʒ.ənt/
KK: /ɪnˌtɛlɪˈdʒɛnʃəl/
Relating to the ability to think, understand, and learn; connected to intelligence.
The intelligential aspects of the project were crucial for its success.
Intelligential is formed from "intelligent" (from Latin "intelligentem", meaning understanding or discerning) and the suffix "-ial" (meaning relating to). The word "intelligential" refers to something that is related to or characterized by intelligence or understanding.
Think of 'intelligent' which means understanding, and the '-ial' suffix indicates a relation. This helps you remember that 'intelligential' relates to intelligence.