surgically

The story

1. Proto-Indo-European*ǵʰes-
2. Proto-Indo-European*ǵʰésōr
3. Proto-Hellenic*kʰéhər
4. Ancient Greekχείρ (kheír)
5. Proto-Indo-European*werǵ-
6. Proto-Indo-European*worǵós
7. Proto-Hellenic*worgós
8. Ancient Greekχειρουργός (kheirourgós)
9. Ancient Greekχειρουργῐκός (kheirourgĭkós)
10. Late Latinchīrurgicus
11. Proto-Indo-European*h₂el-
12. Proto-Indo-European*h₂élisder.?
13. Medieval Latincirurgicālis
14. Middle Frenchcirurgica
15. Middle Englishcirurgical
16. Englishsurgical
17. Proto-Indo-European*leyg-
18. Proto-Germanic*līką
19. English todaysurgically

From surgical + -ly.