Proto-IE: *ek'w- <PIH *e->
Armenian: ēš, gen. išoy 'Esel' >~Hurr. eššǝ 'horse
Old Indian: áśva- m , áśvā f. `horse' >~Hittite: h.l. aś(u)was, pl. aśuwai `horse
Baltic: *ačw-ā̂ f., *ačw-in-a- adj. ... >~ -Georg. aču, ači 'interjection (addressing a horse)', ačua '(child.) horse'