methylase

The story

1. Proto-Indo-European*médʰu
2. Proto-Hellenic*métʰu
3. Ancient Greekμέθυ (méthu)
4. Proto-Indo-European*swel-der.?
5. Ancient Greekῡ̔́λη (hū́lē)
6. GermanMethy
7. Englishmethyl
8. Proto-Indo-European*dwóh₁
9. Proto-Indo-European*trísinflu.
10. Proto-Indo-European*dwís
11. Ancient Greekδιά (diá)
12. Ancient Greekδῐᾰ- (dĭă-)
13. Proto-Indo-European*steh₂-
14. Proto-Indo-European*stísteh₂ti
15. Proto-Hellenic*hístāmi
16. Ancient Greekῐ̔́στημῐ (hĭ́stēmĭ)
17. Ancient Greekδῐῐ̈́στημῐ (dĭĭ̈́stēmĭ)
18. Ancient Greekδῐᾰ́στᾰσῐς (dĭắstăsĭs)
19. Englishdiastase
20. English todaymethylase

From methyl + -ase.