The story
- GermanTryptophan
- Englishtryptophan
- Proto-Italic*wre-
- Latinre-
- Old Frenchre-
- Proto-Indo-European*(s)leg-
- Proto-Indo-European*(s)leg-s-ós
- Latinlaxus
- Latinlaxō
- Vulgar Latin*laxicāre
- Vulgar Latin*lassicāre
- Old Frenchlaschier
- Old Frenchrelaschier
- Old Frenchrelaisser
- Middle Englishrelesen
- Englishrelease
- English todaytriptorelin
From trypto(phan) + -relin (“LHRH release–stimulating peptide”).
Etymology from Wiktionary, CC BY-SA 4.0.