The Avestan word vəhrka-
Word vəhrka-
Meaning wolf
See also Homeric Greek: λύκος ‘wolf’
Old Norse: vargr ‘wolf’
Tocharian B: walkwe ‘wolf’
Proto-Indo-European: *wl̥kʷos ‘wolf’

Other words that might be of interest
spa(n) ‘dog’, aspa ‘horse’, gauu- ‘cow, bull’, pasu ‘cattle, livestock’, sūn- ‘dog’, uštra- ‘camel’, būza ‘male goat, goat’