The Proto-Indo-European word *h₁oh₁k̂-u-
Word *h₁oh₁k̂-u-
Meaning quick
See also Old Norse: kvikna ‘quicken’
Synonyms *h₂ēhₓtró-

Comments
Gk. ōkupous, Lat. ōcior, Welsh diog, Av. āsu, Skr. āśu, Russ. jastreb, OCS jastrębŭ