Third person singular present tense of eventuate; finally happens or results.
From 'eventuate' plus the third person singular present suffix '-s.' Standard modern English verb conjugation.
English verb conjugation is actually quite simple compared to other European languages—Spanish and French require different verb forms for every person (I, you, he, we, they), but English mostly just adds '-s' for third person and calls it done!
Complete word intelligence in one call. Free tier — 50 lookups/day.