mechanochemically

The story

1. Proto-Indo-European*megʰ-der.?
2. Ancient Greekμηχανή (mēkhanḗ)
3. Ancient Greekμηχανικός (mēkhanikós)
4. Latinmēchanicus
5. Old Frenchmecanique
6. Middle Englishmekanyk
7. Englishmechan(ic)
8. Englishmechano-
9. Proto-Indo-European*ǵʰew-
10. Ancient Greekχῠ́μᾰ (khŭ́mă)
11. Ancient Greekχυμείᾱ (khumeíā)
12. Arabicالْكِيمِيَاء (al-kīmiyāʔ)
13. Medieval Latinalchēmia
14. Ancient Greekχυμείᾱ (khumeíā)influ.
15. New Latinchēmia
16. New Latinchēmicus
17. Proto-Indo-European*h₂el-
18. Proto-Indo-European*h₂élisder.?
19. Englishchemical
20. Englishmechanochemical
21. Proto-Indo-European*leyg-
22. Proto-Germanic*līką
23. English todaymechanochemically

From mechanochemical + -ly.