The Tocharian B word keu
Word keu
k e u
IPA keu
Meaning cow
See also Proto-Indo-European: *gʷōus ‘cow, bull’
Hittite: kuu̯āu- ‘cow’
C. Luwian: *wa-a-u-i ‘cow’
Avestan: gauu- ‘cow, bull’
Sanskrit: gáuḥ ‘cow’

Comments
Douglas Q. Adams, “Etymological Dictionary of Tocharian B”, 1999, Brill

Other words that might be of interest
ku ‘dog’, käl-1 ‘bear’, kaurṣe ‘bull’, koro ‘camel’, karse ‘deer’, gaje ‘elephant’, śaiyye, ās ‘goat’, haye ‘horse’, yakwe ‘horse’, yrīye ‘lamb’, ṣecake ‘lion’, mokoṃśke ‘monkey’, okso ‘ox’, ariwe ‘ram’, śaiyye ‘sheep’, aiyye ‘sheep’, walkwe ‘wolf’