Where does “photoréactivité” come from?

photoréactivité (French) comes from French photo-, 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-.

photoréactivité (French): photoreactivity

Definitions

photoreactivity

Ancestry of “photoréactivité”, step by step

Step	Language	Word	Meaning
1	French	photo-	light; 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 →