Where does “diamas” come from?

diamas (Portuguese) comes from Latin adamas, from Ancient Greek ἀδάμας, from Ancient Greek ἀ-, from Proto-Hellenic hə-, from Proto-Indo-European sm̥-, from Proto-Indo-European sem- — together, one.

Ancestry of “diamas”, step by step

StepLanguageWordMeaning
1LatinadamasAdamant; the hardest steel or iron; diamond; an...
2Ancient Greekἀδάμαςadamant, the hardest metal; a hard metal...
3Ancient Greekἀ-The alpha privativum, used to make words that...
4Proto-Hellenichə-same; together
5Proto-Indo-Europeansm̥-one; with, together
6Proto-Indo-Europeansem-together, one
Every word from Proto-Indo-European sem-Every word from Ancient Greek ἀ-Every word from Ancient Greek ἀδάμας