photoproduct

The story

1. Proto-Indo-European*bʰeh₂-
2. Proto-Indo-European*bʰéh₂os
3. Proto-Hellenic*pʰáwos
4. Ancient Greekφᾰ́ος (phắos)
5. Ancient Greekφῶς (phôs)
6. Ancient Greekφωτο- (phōto-)
7. Englishphoto-
8. Proto-Indo-European*per-der.?
9. Proto-Indo-European*pér
10. Proto-Indo-European*pró
11. Proto-Indo-European*pro-
12. Proto-Italic*pro-
13. Latinprō-
14. Proto-Indo-European*dewk-
15. Proto-Indo-European*déwkti
16. Proto-Italic*doukō
17. Latindūcō
18. Latinprōdūcō
19. Latinprōductus
20. Middle Englishproduct
21. Englishproduct
22. English todayphotoproduct

From photo- + product.