phosphopeptide

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. Englishphosphorus
13. Englishphospho-
14. Proto-Indo-European*pekʷ-
15. Proto-Indo-European*pékʷ-ye-
16. Proto-Hellenic*pét͏̌t͏̌ō
17. Ancient Greekπέσσω (péssō)bf.
18. Ancient Greekπέπτω (péptō)
19. Ancient Greekπεπτόν (peptón)
20. GermanPepton
21. Englishpeptone
22. Proto-Indo-European*dʰeh₁-
23. GermanPepton
24. GermanPeptid
25. Englishpeptide
26. English todayphosphopeptide

From phospho- + peptide.