The Thracian word esvas
Word esvas
Meaning horse
See also Cappadocian Greek: έθιο ‘horse’
Proto-Indo-European: *h₁ék̂wos ‘horse’
Old Persian: a-sa-pa ‘horse’
Hittite: ekku ‘horse’
C. Luwian: az-zu-wa- ‘horse’
Mitanni: ašwa ‘horse’

Other words that might be of interest
aiz ‘goat’, brentas ‘deer’, drenis ‘deer’, mezena ‘horseman’