cellophane

The story

1. Proto-Indo-European*ḱel-
2. Latincella
3. Latincellula
4. Frenchcellule
5. Proto-Indo-European*h₃ed-
6. Proto-Indo-European*h₃édosder.?
7. Frenchcellulose
8. Englishcellulose
9. Proto-Indo-European*dwóh₁
10. Proto-Indo-European*trísinflu.
11. Proto-Indo-European*dwís
12. Ancient Greekδιά (diá)
13. Ancient Greekδῐᾰ- (dĭă-)
14. Proto-Indo-European*bʰeh₂-
15. Proto-Indo-European*bʰh₂nyéti
16. Proto-Hellenic*pʰáňňō
17. Ancient Greekφαίνω (phaínō)
18. Ancient Greekδῐᾰφαίνω (dĭăphaínō)
19. Ancient Greekδῐᾰφᾰνής (dĭăphănḗs)
20. Medieval Latindiaphanus
21. Middle Frenchdiaphane
22. Englishdiaphane
23. English todaycellophane

Genericized trademark. Blend of cellulose + diaphane.