The Proto-Indo-European word *h₂r̥ĝ(u)-
Word *h₂r̥ĝ(u)-
Meaning white
See also Proto-Indo-European: *h₂erĝ- ‘white’
Synonyms *ar(e)-ĝ-, *h₄elbʰós, *k̂weitos, *bʰelh₁-

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