carboxyalkyl

The story

1. Proto-Indo-European*kerh₃-der.?
2. Latincarbōnem
3. Frenchcarbone
4. Englishcarbon
5. Proto-Indo-European*swel-der.?
6. Ancient Greekῡ̔́λη (hū́lē)
7. Englishcarbonyl
8. Proto-Indo-European*wed-
9. Proto-Indo-European*wódr̥
10. Proto-Hellenic*údōr
11. Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
12. Ancient Greekὑδρο- (hudro-)
13. Frenchhydro-
14. Proto-Indo-European*ǵenh₁-
15. Proto-Indo-European*ǵénh₁os
16. Proto-Hellenic*génos
17. Ancient Greekγένος (génos)
18. Frenchhydrogène
19. Englishhydrogen
20. Proto-Indo-European*h₂eḱ-der.?
21. Ancient Greekὀξύς (oxús)
22. Ancient Greekγένος (génos)
23. Frenchoxygène
24. Englishoxygen
25. Englishhydroxyl
26. Englishcarboxyl
27. Englishcarboxy
28. Akkadian𒎎𒋆𒁉𒍣𒁕 (guḫlum)
29. Aramaicכוחלא (kuḥlā)
30. Arabicكُحْل (kuḥl)
31. Andalusian Arabicكُحُول (kuḥūl)
32. Medieval Latinalcoho
33. Middle Englishalcofol
34. Englishalc(ohol)
35. Englishalkyl
36. English todaycarboxyalkyl

From carboxy + alkyl.