The Proto-Indo-European word *dhroghós
Word *dhroghós
Meaning wheel
See also Proto-Indo-European: *dhregh- ‘run’
Synonyms *kʷel-, *kʷekʷlóm, *róth₂o/ehₐ, *h₂/₃r̥gis

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