The story
- Proto-Indo-European*dʰwer-
- Proto-Hellenic*tʰurā
- Ancient Greekθῠ́ρᾱ (thŭ́rā)
- Ancient Greekθῠρεός (thŭreós)
- Proto-Indo-European*weyd-
- Proto-Indo-European*wéydos
- Proto-Hellenic*wéidos
- Ancient Greekεἶδος (eîdos)
- Ancient Greekθῠρεοειδής (thŭreoeidḗs)
- New Latinthyreoīdēs
- English todaythyroid
Borrowed from New Latin thyreoīdēs, from Ancient Greek θῠρεοειδής (thŭreoeidḗs, “shield-shaped”), from θῠρεός (thŭreós, “an oblong shield”) + -ειδής (-eidḗs, “-form, -like”).
Etymology from Wiktionary, CC BY-SA 4.0.