thermochemical

The story

1. Proto-Indo-European*gʷʰer-
2. Proto-Indo-European*gʷʰermos
3. Proto-Hellenic*kʷʰermós
4. Ancient Greekθερμός (thermós)
5. Englishthermo-
6. Proto-Indo-European*ǵʰew-
7. Ancient Greekχῠ́μᾰ (khŭ́mă)
8. Ancient Greekχυμείᾱ (khumeíā)
9. Arabicالْكِيمِيَاء (al-kīmiyāʔ)
10. Medieval Latinalchēmia
11. Ancient Greekχυμείᾱ (khumeíā)influ.
12. New Latinchēmia
13. New Latinchēmicus
14. Proto-Indo-European*h₂el-
15. Proto-Indo-European*h₂élisder.?
16. Englishchemical
17. English todaythermochemical

From thermo- + chemical.