polyvinylalcohol

The story

1. Proto-Indo-European*pleh₁-
2. Proto-Indo-European*polh₁ús
3. Ancient Greekπολῠ́ς (polŭ́s)
4. Englishpoly-
5. Proto-Indo-European*weh₁y-?
6. Proto-Indo-European*wéyh₁ō
7. Proto-Italic*wīnom
8. Latinvīnum
9. Proto-Indo-European*swel-der.?
10. Ancient Greekῡ̔́λη (hū́lē)
11. Englishvinyl
12. Englishpolyvinyl
13. Akkadian𒎎𒋆𒁉𒍣𒁕 (guḫlum)
14. Aramaicכוחלא (kuḥlā)
15. Arabicكُحْل (kuḥl)
16. Andalusian Arabicكُحُول (kuḥūl)
17. Medieval Latinalcoho
18. Middle Englishalcofol
19. Englishalcohol
20. English todaypolyvinylalcohol

From polyvinyl + alcohol.