Where does “electromagnetismo” come from?

electromagnetismo (Portuguese) comes from Portuguese magnetismo, from French magnétisme, from Old French magnete, from Latin magnētum, from Ancient Greek μαγνῆτις, from Ancient Greek Μαγνησία, from Ancient Greek -ῐ́ᾱ, from Proto-Indo-European -íh₂ — Creates collective nouns, which refer to groups...

Ancestry of “electromagnetismo”, step by step

StepLanguageWordMeaning
1Portuguesemagnetismomagnetism
2Frenchmagnétismemagnetism
3Old Frenchmagnetemagnetite
4Latinmagnētum—
5Ancient Greekμαγνῆτις—
6Ancient GreekΜαγνησίαMagnesia
7Ancient Greek-ῐ́ᾱ{{l|en|-ia}}; "suffix forming abstract feminine...
8Proto-Indo-European-íh₂—
9Proto-Indo-European-h₂Creates collective nouns, which refer to groups...
Every word from Proto-Indo-European -h₂ →Every word from Ancient Greek -ῐ́ᾱ →Every word from Ancient Greek Μαγνησία →