photodevice

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. Latindis-
9. Proto-Indo-European*dwóh₁
10. Proto-Indo-European*dwi-
11. Proto-Indo-European*dʰeh₁-
12. Proto-Indo-European*h₁weydʰh₁-
13. Proto-Italic*wiðō
14. Latin*vidō
15. Latindīvidō
16. Latindīvīsus
17. Old Frenchdevis
18. Middle Englishdevis
19. Englishdevice
20. English todayphotodevice

From photo- + device.