astrodiagnosis

The story

1. Proto-Indo-European*h₂eHs-
2. Proto-Indo-European*h₂stḗr
3. Proto-Hellenic*astḗr
4. Ancient Greekἀστήρ (astḗr)
5. Ancient Greekᾰ̓́στρον (ắstron)
6. Englishastro-
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 todayastrodiagnosis

From astro- + diagnosis.