The story
- Proto-Indo-European*(s)ker-
- Proto-Indo-European*(s)kert-
- Proto-Indo-European*(s)kort-ek-s
- Latincortex
- Englishcortico-
- Proto-Indo-European*trep-
- Ancient Greekτρέπω (trépō)
- Ancient Greekτροπή (tropḗ)
- Ancient Greekτροπῐκός (tropĭkós)
- Englishcorticotropin
- 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 todaycorticorelin
From cortico(tropin) + -relin (“pituitary hormone release–stimulating peptide”).
Etymology from Wiktionary, CC BY-SA 4.0.