ọ̀kọnrẹ̀n noun /ɔ̀.kɔ̃̄.ɾɛ̃̀/
Definitions
  1. the only one
Etymology
From ọ̀kọn (“one”) + rẹ̀n. The rẹ̀n possibly means "that" related to the Ijebu word ìyẹ̀n (“that”) and the Itsekiri word ẹ́rẹ̀n (“that”).
Component words
ọ̀kọnonerẹ̀n
Source: Wiktionary, where this word is spelled “ọkọnrẹn”. Reference: en-ọkọnrẹn-yo-noun-inZcqtuz