The Proto-Indo-European word *h₂ehₓmer-
Word *h₂ehₓmer-
Meaning day
See also Proto-Indo-European: *h₂ehₓ- ‘to burn, to be hot’
Synonyms *deino-, *hₐéĝhr̥, *dye(u)-

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