Where does “petroleiro” come from?

petroleiro (Galician) comes from Galician petróleo, from Medieval Latin petroleum, from Latin oleum, from Ancient Greek ἔλαιον, from Ancient Greek ἐλαία, from Proto-Hellenic elaíwā, from Proto-Indo-European loiwom.

petroleiro (Galician): oil, petrol related to mineral oil

Definitions

oil, petrol related to mineral oil

Ancestry of “petroleiro”, step by step

Step	Language	Word	Meaning
1	Galician	petróleo	petroleum, oil
2	Medieval Latin	petroleum	—
3	Latin	oleum	olive oil; the palaestra
4	Ancient Greek	ἔλαιον	olive oil, commonly used as an anointing oil; any...
5	Ancient Greek	ἐλαία	olive tree; olive; naevus
6	Proto-Hellenic	elaíwā	—
7	Proto-Indo-European	loiwom	—

Words derived from “petroleiro”

superpetroleiro

Every word from Proto-Indo-European loiwom →Every word from Proto-Hellenic elaíwā →Every word from Ancient Greek ἐλαία →