The Proto-Indo-European word *wl̥kʷos
Word *wl̥kʷos
Meaning wolf
See also Homeric Greek: λύκος ‘wolf’
Euphratic: *lik ‘wolf’
Euphratic: *lib / lub ‘fox’
Old Norse: vargr ‘wolf’
Tocharian B: walkwe ‘wolf’
C. Luwian: u-al-ua ‘lion’
Proto-Indo-European: *wl̥kʷíha- ‘she-wolf’
Proto-Italic: lukʷ-o ‘wolf’
Avestan: vəhrka- ‘wolf’
Armenian: gayl ‘wolf’
Latin: lupus ‘wolf’
Synonyms *dhóhaus, *dhau-kos, *wlkʷ-o-, *wailos

Comments
Mallory J.P. and Adams D. (2006)

Other words that might be of interest
*gʷōus ‘cow, bull’, *ghaidos ‘goat’, *h₁eperos ‘boar’, *h₁er- ‘goat’, *h₁ék̂wos ‘horse’, *h₂ŕ̥tk̂os ‘bear’, *hₐegʷhnos ‘lamb’, *hₐeiĝs ‘goat’, *h₃owi- (nom. h₃owi-s, gen. h₃ewy-ós) ‘sheep’, *k̂won- (nom. k̂wōn, gen. k̂un-ós) ‘dog’, *kapro- ‘goat’, *leh₃p- ‘cow’, *márkos ‘horse’, *suh₁- ‘swine, pig’, *díks ‘goat’, *gras- ‘to eat, to graze’, *h₁eĝh- ‘cow’, *h₁eri- ‘sheep, goat’, *h₂ówis ‘sheep’, *koĝhéhₐ- ‘goat’, *tauros ‘aurochs, bull’, *twork̂ós ‘boar’, *uk(w)sēn- ‘ox’, *wok̂éhₐ- ‘cow’, *(y)ebʰ- ‘elephant’, *wr̥h₁ēn ‘lamb’, *k̂(u)wōn ‘dog’, *li(w)- ‘lion’, *lohapo- ‘cow’, *mendyos ‘horse’, *moisós ‘sheep, ram, fleece, skin’, *perd- ‘lion, panther’, *(s)k̂egos ‘sheep, goat’, *ĝhéyos ‘horse’