autophagosome

The story

1. Proto-Indo-European*h₂ew
2. Proto-Indo-European*tó-
3. Proto-Hellenic*autós
4. Proto-Indo-European*h₂ew
5. Ancient Greekαὖ (aû)
6. Ancient Greekτόν (tón)
7. Ancient Greekαὐτός (autós)
8. Ancient Greekαὐτο- (auto-)
9. Englishauto-
10. Englishphago-
11. Proto-Indo-European*tewh₂-
12. Proto-Indo-European*twoH-mn̥
13. Proto-Hellenic*twṓmə?
14. Proto-Indo-European*styeH-
15. Proto-Indo-European*(s)tyoH-mn̥
16. Proto-Hellenic*styṓmə?
17. Ancient Greekσῶμα (sôma)
18. Englishphagosome
19. English todayautophagosome

From auto- + phagosome.