ìpilẹ̀ṣẹ̀ noun /ì.k͡pī.lɛ̀.ʃɛ̀/
Definitions
  1. foundation, origin, source
    èdè Yorùbá jẹ́ ìpilẹ̀sẹ̀ àṣà Yorùbá The Yoruba language is the foundation of the Yoruba culture
Etymology
From ìpilẹ̀ (“base, root”) + ṣẹ̀ (“to originate”), ultimately from ì- (“nominalizing prefix”) + pa (“to open”) + ilẹ̀ (“ground, starting point”).
Component words
Wiktionary records 2 different ways of breaking this word down. Each line is one of them, not a further part.
ìpilẹ̀base, rootṣẹ̀to originate
Source: Wiktionary, where this word is spelled “ipilẹṣẹ”. Reference: en-ipilẹṣẹ-yo-noun-1F9hHD0-