The Proto-Indo-European word *h₂éy-es- (nom. h₂eyos, gen. h₂eyesos)
Word *h₂éy-es- (nom. h₂eyos, gen. h₂eyesos)
Meaning metal
Synonyms *hₐeyes-

Comments
Skr. ayas, Lat. aes, Umbrian ahesnes, Gm. ēr/Erz, Eng. ār/ore, Av. ayaṅ h, Goth. aiz, ON eir, Gaul. Isarnodori, Ir. iarn/iarann, Welsh haearn, Pers. /āhan

Other words that might be of interest
*silVbVr- ‘silver’, *h₂erĝn̥tom ‘silver, white (metal)’