The Proto-Indo-European word *h₂ēhₓtró-
Word *h₂ēhₓtró-
Meaning fast, quick
See also Proto-Indo-European: *h₂ehₓ- ‘to burn, to be hot’
Synonyms *ar(e)-ĝ-, *h₁oh₁k̂-u-, *bʰris-~bʰers-, *h₁ōk̂-us, *h₂r̥ĝ-rós, *k̂eigh-, *hₐeĝilos

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