Where does “photo-” come from?

photo- (English) comes from Ancient Greek φωτο-, 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-.

photo- (English): light, electromagnetic radiation; photography

Definitions

  1. light, electromagnetic radiation; photography

Ancestry of “photo-”, step by step

StepLanguageWordMeaning
1Ancient Greekφωτο-—
2Ancient GreekφῶςAttic form of φᾰ́ος
3Proto-Hellenicpʰáos—
4Proto-Indo-Europeanbʰéh₂os—
5Proto-Indo-Europeanbʰeh₂-to shine, glow light; to speak, say
6Proto-Indo-Europeanbʰeh₂-s-ri-—

Words derived from “photo-”

Every word from Proto-Indo-European bʰeh₂-s-ri- →Every word from Proto-Indo-European bʰeh₂- →Every word from Ancient Greek φωτο- →