neodiagnosis

The story

1. Proto-Indo-European*nu
2. Proto-Indo-European*néwos
3. Proto-Hellenic*néwos
4. Ancient Greekνέος (néos)
5. Ancient Greekνεο- (neo-)
6. Englishneo-
7. Proto-Indo-European*dwóh₁
8. Proto-Indo-European*trísinflu.
9. Proto-Indo-European*dwís
10. Ancient Greekδιά (diá)
11. Ancient Greekδια- (dia-)
12. Proto-Indo-European*ǵneh₃-
13. Proto-Indo-European*ǵn̥h₃sḱéti
14. Proto-Hellenic*gignṓskō
15. Ancient Greekγῐγνώσκω (gĭgnṓskō)
16. Ancient Greekδῐαγῐγνώσκω (dĭagĭgnṓskō)
17. Ancient Greekδῐᾰ́γνωσῐς (dĭắgnōsĭs)
18. Latindiagnōsis
19. Englishdiagnosis
20. English todayneodiagnosis

From neo- + diagnosis.