esì noun /ē.sì/
Definitions
  1. warthog, hog; (in particular) red river hog
Etymology
Proposed to be derived from Proto-Yoruboid *é-sì, compare with Igala éhì, Itsekiri esin, also see Khana zi, Edo èsì, Urhobo esi, Idoma eshi, Igbo ezì, Ogbia eznì, perhaps also Ibibio edi
Source: Wiktionary · etymology 1, where this word is spelled “esi”. Reference: en-esi-yo-noun-BYNoi57f