ìyọ noun /ì.jɔ̄/
Definitions
  1. subtraction, removal
Etymology
ì- (“nominalizing prefix”) + yọ (“to remove, to subtract”)
Component words
ì-nominalizing prefixyọto remove, to subtract
Source: Wiktionary · etymology 2, where this word is spelled “iyọ”. Reference: en-iyọ-yo-noun-M9NFllaa