Where does “aço” come from?
aço (Portuguese) comes from Old Portuguese açeyro, from Late Latin aciarium, from Latin aciēs, from Latin aceō, from Proto-Italic akēō, from Proto-Indo-European h₂eḱ-éh₁-ye-ti, from Proto-Indo-European h₂eḱ- — sharp.
aço (Portuguese): steel
Ancestry of “aço”, step by step