ẹrú noun /ɛ̄.ɾú/
erú (alternative, Ekiti), èrù (alternative), ẹ̀ù (alternative)
Definitions
  1. slave
Etymology
Proposed to be derived from Proto-Yoruboid *á-ɗú. Compare with Ifè arú, Ayere árú, Igbo oru
Source: Wiktionary · etymology 4, where this word is spelled “ẹru”. Reference: en-ẹru-yo-noun-GDk2sBDG