ballistocardiographically

The story

1. Proto-Indo-European*gʷelH-
2. Proto-Hellenic*gʷəlnō
3. Ancient Greekβᾰ́λλω (bắllō)
4. Ancient Greekβαλλίστρᾱ (ballístrā)
5. Classical Latinballista
6. New Latinballisticu
7. Englishballistic
8. Englishballisto-
9. Proto-Indo-European*ḱerd-
10. Proto-Indo-European*ḱḗr
11. Proto-Indo-European*ḱr̥díyeh₂
12. Proto-Hellenic*kərdíyā
13. Ancient Greekκαρδία (kardía)
14. Englishcardio-
15. Proto-Indo-European*gerbʰ-
16. Proto-Hellenic*grə́pʰō
17. Ancient Greekγρᾰ́φω (grắphō)
18. Ancient Greekγραφή (graphḗ)
19. Englishcardiography
20. Englishballistocardiography
21. Englishballistocardiographic
22. Proto-Indo-European*h₂el-
23. Proto-Indo-European*h₂élisder.?
24. Proto-Indo-European*leyg-
25. Proto-Germanic*līką
26. English todayballistocardiographically

From ballistocardiographic + -ally.