The Proto-Indo-European word *hₐeĝilos
Word *hₐeĝilos
Meaning fast
See also Proto-Indo-European: *hₐeĝ- ‘to drive, to fight’
Synonyms *ar(e)-ĝ-, *bʰris-~bʰers-, *h₁ōk̂-us, *h₂r̥ĝ-rós, *k̂eigh-, *h₂ēhₓtró-

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