-tirelin

Etymology tree Proto-Indo-European *dʰwer-der. Proto-Hellenic *tʰurā Ancient Greek θῠ́ρᾱ (thŭ́rā) Ancient Greek -εος (-eos) Ancient Greek θῠρεός (thŭreós) Proto-Indo-European *weyd-der. Ancient Greek εἶδος (eîdos) Proto-Indo-European *-os Proto-Indo-European *-ēs Ancient Greek -ης (-ēs) Ancient Greek -ειδής (-eidḗs) Ancient Greek θῠρεοειδής (thŭreoeidḗs)bor. New Latin thyreoīdēsbor. English thyroid Ancient Greek -ο- (-o-)der. Latin -o-bor. English -o- English thyro- Proto-Indo-European *trep-der. Ancient Greek τρέπω (trépō) Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Ancient Greek -ᾱ (-ā) Ancient Greek -η (-ē) Ancient Greek τροπή (tropḗ) Proto-Indo-European *-kos Ancient Greek -κός (-kós) Ancient Greek -ικός (-ikós) Ancient Greek τροπῐκός (tropĭkós)bor. English -tropic Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ineclip. English -in English -tropin English thyrotropin Proto-Italic *wre- Latin re-der. Old French re- Proto-Indo-European *(s)leg- Proto-Indo-European *(s)leg-s-ós Latin laxus ▲ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Italic *-āō Latin -ō Latin laxō Vulgar Latin *laxicāre Vulgar Latin *lassicāre Old French laschier Old French relaschier Old French relaisserbor. Middle English relesen English release ▲ English -in English -relin English -tirelin From thy(rotropin) + -relin (“pituitary hormone release–stimulating peptide”).

来源：wiktionary