The Proto-Indo-European word *h₁éitr̥-
Word *h₁éitr̥-
Meaning way, road
See also Proto-Indo-European: *h₁ei- ‘to go’
Synonyms *pent-, *pértus, *sentos, *weĝhyehₐ

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