immunopathologic

The story

1. Proto-Indo-European*mey-
2. Proto-Indo-European*moy-nós
3. Proto-Italic*moinos
4. Latinmūnus
5. Proto-Indo-European*né
6. Proto-Indo-European*n̥-
7. Proto-Italic*n̥-
8. Latinin-
9. Latinin- -is
10. Latinimmūnis
11. Middle Frenchimmun
12. Englishimmune
13. Englishimmuno-
14. Ancient Greekπάσχω (páskhō)
15. Ancient Greekπᾰ́θος (pắthos)
16. Proto-Indo-European*leǵ-
17. Proto-Indo-European*lóǵos
18. Proto-Hellenic*lógos
19. Ancient Greekλόγος (lógos)
20. Ancient Greekπαθολογίᾱ (pathologíā)
21. Ancient Greekπᾰθολογῐκός (păthologĭkós)
22. Englishpathologic
23. English todayimmunopathologic

From immuno- + pathologic.