postneurosurgical

The story

1. Proto-Indo-European*pós
2. Proto-Indo-European*pósti
3. Proto-Italic*posti
4. Old Latinposte
5. Latinpost
6. Englishpost-
7. Proto-Indo-European*(s)neh₁-
8. Proto-Indo-European*snéh₁wr̥
9. Ancient Greekνεῦρον (neûron)
10. Ancient Greekνευρο- (neuro-)
11. Englishneuro-
12. Proto-Indo-European*ǵʰes-
13. Proto-Indo-European*ǵʰésōr
14. Proto-Hellenic*kʰéhər
15. Ancient Greekχείρ (kheír)
16. Proto-Indo-European*werǵ-
17. Proto-Indo-European*worǵós
18. Proto-Hellenic*worgós
19. Ancient Greekχειρουργός (kheirourgós)
20. Ancient Greekχειρουργῐκός (kheirourgĭkós)
21. Late Latinchīrurgicus
22. Proto-Indo-European*h₂el-
23. Proto-Indo-European*h₂élisder.?
24. Medieval Latincirurgicālis
25. Middle Frenchcirurgica
26. Middle Englishcirurgical
27. Englishsurgical
28. Englishneurosurgical
29. English todaypostneurosurgical

From post- + neurosurgical.