àbígbẹ̀yìn noun /à.bí.ɡ͡bɛ̀.jĩ̀/
Definitions
  1. lastborn
Etymology
From à- (“nominalizing prefix”) + bí (“to birth”) + gbẹ̀yìn (“last”).
Component words
à-nominalizing prefixto birthgbẹ̀yìnlast
Source: Wiktionary, where this word is spelled “abigbẹyin”. Reference: en-abigbẹyin-yo-noun-ns~e1iX6