diagnonsense

The story

1. Proto-Indo-European*dwóh₁
2. Proto-Indo-European*trísinflu.
3. Proto-Indo-European*dwís
4. Ancient Greekδιά (diá)
5. Ancient Greekδια- (dia-)
6. Proto-Indo-European*ǵneh₃-
7. Proto-Indo-European*ǵn̥h₃sḱéti
8. Proto-Hellenic*gignṓskō
9. Ancient Greekγῐγνώσκω (gĭgnṓskō)
10. Ancient Greekδῐαγῐγνώσκω (dĭagĭgnṓskō)
11. Ancient Greekδῐᾰ́γνωσῐς (dĭắgnōsĭs)
12. Latindiagnōsis
13. Englishdiagnosis
14. Proto-Indo-European*né
15. Proto-Germanic*ne
16. Proto-Indo-European*ís?
17. Proto-Indo-European*h₁óynos
18. Proto-Germanic*ainaz
19. Proto-Germanic*nainaz
20. Proto-West Germanic*nain
21. Old Englishnān
22. Middle Englishnon
23. Old Englishnān
24. Old Englishnān-
25. Middle Englishnon-
26. Englishnon-
27. Proto-Indo-European*sent-
28. Proto-Italic*sentiō
29. Latinsentiō
30. Latinsēnsu
31. Proto-Germanic*sinnaz
32. Frankish*sinn
33. Vulgar Latin*sennus
34. Old Frenchsens
35. Middle Englishsense
36. Englishsense
37. Englishnonsense
38. English todaydiagnonsense

Blend of diagnosis + nonsense.