nonperfusion

The story

1. Proto-Indo-European*né
2. Proto-Germanic*ne
3. Proto-Indo-European*ís?
4. Proto-Indo-European*h₁óynos
5. Proto-Germanic*ainaz
6. Proto-Germanic*nainaz
7. Proto-West Germanic*nain
8. Old Englishnān
9. Middle Englishnon
10. Old Englishnān
11. Old Englishnān-
12. Middle Englishnon-
13. Englishnon-
14. Proto-Indo-European*per-
15. Proto-Italic*peri-
16. Latinper-
17. Proto-Indo-European*ǵʰew-
18. Proto-Indo-European*ǵʰewd-
19. Proto-Indo-European*ǵʰunédti
20. Proto-Italic*hundō
21. Latinfundō
22. Latinperfundō
23. Latinperfūsiō
24. Middle Frenchperfusion
25. Englishperfusion
26. English todaynonperfusion

From non- + perfusion.