photorealistic

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*(H)reh₁-
9. Proto-Indo-European*(H)reh₁ís
10. Proto-Italic*reis
11. Classical Latinrēs
12. Proto-Indo-European*h₂el-
13. Proto-Indo-European*h₂élisder.?
14. Late Latinreālis
15. Old Frenchree
16. Middle Englishreal
17. Englishreal
18. Englishrealist
19. Englishrealistic
20. English todayphotorealistic

From photo- + realistic.