tazobactam

The story

1. Proto-Indo-European*tréyes
2. Proto-Indo-European*tri-
3. Proto-Italic*tri-
4. Latintri-
5. Englishtri-
6. Proto-Indo-European*né
7. Proto-Indo-European*n̥-
8. Proto-Hellenic*ə-
9. Ancient Greekᾰ̓- (ă-)
10. Proto-Indo-European*gʷeyh₃-
11. Proto-Indo-European*gʷih₃wós
12. Proto-Indo-European*gʷíh₃weti
13. Proto-Hellenic*gʷyṓw-ō
14. Proto-Hellenic*d͏̌ṓwō
15. Ancient Greekζώω (zṓō)
16. Ancient Greekζῶ (zô)
17. Ancient Greekζωή (zōḗ)
18. Frenchazote
19. Englishazote
20. Englishazo-
21. Englishazole
22. Englishtriazole
23. Proto-Indo-European*swel-der.?
24. Ancient Greekῡ̔́λη (hū́lē)
25. Englishtriazolyl
26. Proto-Semitic*bayt-
27. Phoenician𐤁𐤕 (bt)
28. Ancient Greekβῆτᾰ (bêtă)
29. Englishbeta
30. Latinlac
31. Englishlacto-
32. GermanKeton
33. Englishketone
34. Englishlac(tone)
35. Egyptianjmn
36. Ancient GreekᾸ̓́μμων (Ắmmōn)
37. LatinAmmōn
38. Latinammoniacus
39. Englishammonia
40. Proto-Indo-European*dʰeh₁-
41. Englisham(ide)
42. Englishlactam
43. Englishbeta-lactam
44. Proto-Indo-European*dwóh₁
45. Proto-Indo-European*trísinflu.
46. Proto-Indo-European*dwís
47. Ancient Greekδιά (diá)
48. Ancient Greekδῐᾰ- (dĭă-)
49. Proto-Indo-European*steh₂-
50. Proto-Indo-European*stísteh₂ti
51. Proto-Hellenic*hístāmi
52. Ancient Greekῐ̔́στημῐ (hĭ́stēmĭ)
53. Ancient Greekδῐῐ̈́στημῐ (dĭĭ̈́stēmĭ)
54. Ancient Greekδῐᾰ́στᾰσῐς (dĭắstăsĭs)
55. Englishdiastase
56. Englishbeta-lactamase
57. English todaytazobactam

From t(ri)azo(lyl) + -bactam (“β-lactamase inhibitor”).