supramicrosurgical

The story

1. Proto-Indo-European*úp
2. Proto-Indo-European*upér
3. Proto-Italic*super
4. Proto-Italic*superos
5. Proto-Italic*superād
6. Old Latinsuprād
7. Latinsuprā
8. Latinsupra-
9. Englishsupra-
10. Proto-Indo-European*mey-der.?
11. Ancient Greekμῑκρός (mīkrós)
12. Ancient Greekμῑκρο- (mīkro-)
13. Englishmicro-
14. Proto-Indo-European*ǵʰes-
15. Proto-Indo-European*ǵʰésōr
16. Proto-Hellenic*kʰéhər
17. Ancient Greekχείρ (kheír)
18. Proto-Indo-European*werǵ-
19. Proto-Indo-European*worǵós
20. Proto-Hellenic*worgós
21. Ancient Greekχειρουργός (kheirourgós)
22. Ancient Greekχειρουργῐκός (kheirourgĭkós)
23. Late Latinchīrurgicus
24. Proto-Indo-European*h₂el-
25. Proto-Indo-European*h₂élisder.?
26. Medieval Latincirurgicālis
27. Middle Frenchcirurgica
28. Middle Englishcirurgical
29. Englishsurgical
30. Englishmicrosurgical
31. English todaysupramicrosurgical

From supra- + microsurgical.