ẹ̀ta òkò noun /ɛ̀.tā ò.kò/
Definitions
  1. a nickname for a set of triplet
Etymology
From ẹ̀ta (“three”) + òkò (“stones”), literally “Three stones”
Component words
Source: Wiktionary, where this word is spelled “ẹta oko”. Reference: en-ẹta_oko-yo-noun-GlH6tm9B