Russian уголь

← Old Church Slavonic ѫгль (cognate)

← Proto-Balto-Slavic *ánˀglis (inherited)

← Proto-Indo-European *h₁engʷ- (root)

← Proto-Indo-European *h₁óngʷl̥ (inherited)

← Old East Slavic угъль (inherited)

← Old East Slavic угль (mention)

← Proto-Slavic *ǫglь (inherited)