transgenerational

The story

1. Proto-Indo-European*terh₂-
2. Proto-Indo-European*térh₂t
3. Proto-Indo-European*tr̥h₂ónts
4. Proto-Indo-European*tr̥h₂n̥ts
5. Proto-Italic*trāns
6. Proto-Italic*trāns-
7. Latintrans-
8. Englishtrans-
9. Proto-Indo-European*ǵenh₁-
10. Proto-Indo-European*ǵénh₁os
11. Proto-Italic*genos
12. Latingenus
13. Latingenerō
14. Latingenerātiō
15. Old Frenchgeneracion
16. Latingenerātiō
17. Middle Englishgeneracioun
18. Englishgeneration
19. Proto-Indo-European*h₂el-
20. Proto-Indo-European*h₂élisder.?
21. Englishgenerational
22. English todaytransgenerational

From trans- + generational.