The Hittite word ekku
Word ekku
Meaning horse
See also Linear B: i-qo ‘horse’
Sanskrit: aśvaḥ ‘horse’
Thracian: esvas ‘horse’
Greek: Ίππος ‘horse’
Latin: equus ‘horse’
Proto-Indo-European: *h₁ék̂wos ‘horse’
Old Persian: a-sa-pa ‘horse’
Old Norse: *ehwaz ‘horse’
Tocharian B: yakwe ‘horse’
C. Luwian: az-zu-wa- ‘horse’
Proto-Anatolian: *ʔeku- ‘horse’
Mitanni: ašwa ‘horse’
Lycian: esbe ‘horse’

Comments
In Hittite the word for 'horse' is only attested written with the sumerogram ANS̆E.KUR.RA. The rendered cuneiform is hypothetical.

Other words that might be of interest
i-ia-an-ta-an ‘sheep’, kuu̯āu- ‘cow’, a-li-ya-na ‘deer’, la-aḫ-pa-aš ‘ivory, elephant’