Where does “fotodetetor” come from?

fotodetetor (Portuguese) comes from Portuguese foto-, from Ancient Greek φωτός, from Ancient Greek φῶς, from Proto-Hellenic pʰáos, from Proto-Indo-European bʰéh₂os, from Proto-Indo-European bʰeh₂-, from Proto-Indo-European bʰeh₂-s-ri-.

fotodetetor (Portuguese): photodetector

Definitions

photodetector

Ancestry of “fotodetetor”, step by step

Step	Language	Word	Meaning
1	Portuguese	foto-	photo-
2	Ancient Greek	φωτός	genitive singular of φῶς; light; of light
3	Ancient Greek	φῶς	Attic form of φᾰ́ος
4	Proto-Hellenic	pʰáos	—
5	Proto-Indo-European	bʰéh₂os	—
6	Proto-Indo-European	bʰeh₂-	to shine, glow light; to speak, say
7	Proto-Indo-European	bʰeh₂-s-ri-	—

Every word from Proto-Indo-European bʰeh₂-s-ri- →Every word from Proto-Indo-European bʰeh₂- →Every word from Proto-Indo-European bʰéh₂os →