ukù noun /ū.kù/
Definitions
  1. Ìkálẹ̀ and Ìjẹ̀bú form of ikùn (“stomach”) Ekiti
Dialect
Ọ̀bà Àkókó, Ìjẹ̀bú Òde, Àgọ́ Ìwòyè, Ìjẹ̀bú Igbó, Ẹ̀pẹ́, Ìkẹ́nnẹ́, Ìkòròdú, Òde Rẹ́mọ, Ṣágámù, Òkìtìpupa, Oǹdó, Àdó Èkìtì, Ìfàkì Èkìtì, Àkúrẹ́, Ìlárá-Mọ̀kín/Ùláá dialect form of ikùn noun
Etymology
u- (“nominalizing prefix”) + kù (“to grumble”)
Component words
Source: Wiktionary · etymology 2, where this word is spelled “uku”. Reference: en-uku-yo-noun-5pw-MAPJ