cryosurgery

The story

1. Ancient Greekκρῠ́ος (krŭ́os)
2. Englishcryo-
3. Proto-Indo-European*ǵʰes-
4. Proto-Indo-European*ǵʰésōr
5. Proto-Hellenic*kʰéhər
6. Ancient Greekχείρ (kheír)
7. Proto-Indo-European*werǵ-
8. Proto-Indo-European*worǵós
9. Proto-Hellenic*worgós
10. Ancient Greekχειρουργός (kheirourgós)
11. Ancient Greekχειρουργέω (kheirourgéō)
12. Ancient Greekχειρουργίᾱ̆ (kheirourgíā̆)
13. Latinchīrūrgia
14. Old Frenchsurgie
15. Old Frenchsurgerie
16. Middle Englishsurgerie
17. Englishsurgery
18. English todaycryosurgery

From cryo- + surgery.