IPA: /ɪˈvɛn.tʃu.əl/
KK: /ɪˈvɛnʧuəl/
Relating to something that will happen at a later time, often as a result of a process or series of events.
After many challenges, she achieved her eventual goal of becoming a doctor.
Eventual is formed from "event" (from Latin "eventus", meaning outcome or result) and "-ual" (meaning relating to). The word "eventual" refers to something that is related to or resulting from an event, often implying a final outcome.
Think of an 'event' leading to a final 'outcome' — that's what 'eventual' means, relating to the result of an event.