phosphatidylethanolamine

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. Proto-Indo-European*bʰer-
7. Proto-Indo-European*bʰéreti
8. Proto-Hellenic*pʰérō
9. Ancient Greekφέρω (phérō)
10. Ancient Greekφωσφόρος (phōsphóros)
11. Latinphōsphorus
12. Frenchphosphore
13. Frenchphosphate
14. Englishphosphate
15. Proto-Indo-European*dʰeh₁-
16. Englishphosphatide
17. Englishphosphatidate
18. Proto-Indo-European*swel-der.?
19. Ancient Greekῡ̔́λη (hū́lē)
20. Englishphosphatidyl
21. Proto-Indo-European*h₂eydʰ-
22. Proto-Hellenic*áitʰō
23. Ancient Greekαἴθω (aíthō)
24. Ancient Greekᾱ̓ήρ (āḗr)influ.?
25. Ancient Greekαἰθήρ (aithḗr)
26. Latinaethēr
27. GermanÄther
28. GermanEther
29. Ancient Greekῡ̔́λη (hū́lē)
30. GermanEthy
31. Englishethyl
32. Akkadian𒎎𒋆𒁉𒍣𒁕 (guḫlum)
33. Aramaicכוחלא (kuḥlā)
34. Arabicكُحْل (kuḥl)
35. Andalusian Arabicكُحُول (kuḥūl)
36. Medieval Latinalcoho
37. Middle Englishalcofol
38. Englishalcohol
39. Englishethyl
40. Englisheth-
41. Englishethane
42. Englishalcohol
43. Englishethanol
44. Egyptianjmn
45. Ancient GreekᾸ̓́μμων (Ắmmōn)
46. LatinAmmōn
47. Latinammoniacus
48. Englishammonia
49. Englishamine
50. Englishethanolamine
51. English todayphosphatidylethanolamine

From phosphatidyl + ethanolamine.