urease

The story

1. Proto-Indo-European*h₁wers-
2. Ancient Greekοὐρέω (ouréō)
3. Ancient Greekοὖρον (oûron)
4. Frenchurée
5. Englishurea
6. Proto-Indo-European*dwóh₁
7. Proto-Indo-European*trísinflu.
8. Proto-Indo-European*dwís
9. Ancient Greekδιά (diá)
10. Ancient Greekδῐᾰ- (dĭă-)
11. Proto-Indo-European*steh₂-
12. Proto-Indo-European*stísteh₂ti
13. Proto-Hellenic*hístāmi
14. Ancient Greekῐ̔́στημῐ (hĭ́stēmĭ)
15. Ancient Greekδῐῐ̈́στημῐ (dĭĭ̈́stēmĭ)
16. Ancient Greekδῐᾰ́στᾰσῐς (dĭắstăsĭs)
17. Englishdiastase
18. English todayurease

From urea + -ase.