thiolation

The story

1. Proto-Indo-European*dʰewh₂-der.?
2. Ancient Greekθέειον (théeion)
3. Ancient Greekθεῖον (theîon)
4. Englishthio-
5. Akkadian𒎎𒋆𒁉𒍣𒁕 (guḫlum)
6. Aramaicכוחלא (kuḥlā)
7. Arabicكُحْل (kuḥl)
8. Andalusian Arabicكُحُول (kuḥūl)
9. Medieval Latinalcoho
10. Middle Englishalcofol
11. Englishalcohol
12. Englishthiol
13. English todaythiolation

From thiol + -ation.