Etymograph

English

hypothyroidism

Hypothyroidism comes from Ancient Greek θῠρεοειδής ‘Shield-shaped’, from Proto-Indo-European *wéydos ‘seeing’, and ultimately from *weyd- ‘to see’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*weyd-‘to see’reconstructed
  2. Proto-Indo-European, derivedc. 4500–2500 BCE*wéydos‘seeing’reconstructed
  3. Proto-Hellenicc. 2200–1600 BCE*wéidosreconstructed
  4. Ancient Greekc. 800–300 BCEεἶδοςeîdos
  5. Ancient Greek, derivedc. 800–300 BCEθῠρεοειδήςthŭreoeidḗs‘Shield-shaped’
  6. New Latinmodernthyreoīdēs
  7. English1500–presentthyroid
  8. Englishtodayhypothyroidism

attested reconstructed ? uncertain or disputed

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*weyd-‘to see’reconstructed
  2. Proto-Indo-European, derivedc. 4500–2500 BCE*wéydos‘seeing’reconstructed
  3. Proto-Hellenicc. 2200–1600 BCE*wéidosreconstructed
  4. Ancient Greekc. 800–300 BCEεἶδοςeîdos
  5. Ancient Greek, derivedc. 800–300 BCEθῠρεοειδήςthŭreoeidḗs‘Shield-shaped’
  6. New Latinmodernthyreoīdēs
  7. English1500–presentthyroid
  8. Englishtodayhypothyroidism

Formed from hypo- ‘under’ + thyroid + -ism

Proto-Indo-European *upó ‘under, below’

Ancient Greek ὑπό ‘under’

English hypo-

Proto-Indo-European *dʰwer- ‘door’

…

Ancient Greek θῠ́ρᾱ ‘door’

Ancient Greek θῠρεός ‘an oblong shield’

Ancient Greek θῠρεοειδής ‘shield-shaped’

New Latin thyreoīdēs ‘Shaped like a shield’

English thyroid

The story

Coined c. between 1900 and 1905 from hypo- (‘under’) + thyroid + -ism.

Linked words

through Proto-Indo-European *weyd- ‘to see’

story, guy, video, idea, review, evidence, visit, provide, advice, interview, guide, witness, vision, historic, wisdom, invisible, visa, wit, advise, wizard, evident, historian, visibility, vista, witty, wisely, prudent, revise, guise, envious, prudence, revue, unwise, purview, druid, improvise, vide, twit, avis, voyeur, 105 more

through Proto-Indo-European *wéydos ‘seeing’

wise, 48 more

through Proto-Hellenic *wéidos

eidolon, steroidal, 48 more

through Ancient Greek εἶδος

idol, tabloid, steroid, idyll, trapezoid, colloid, hyoid, sigmoid, 50 more

through Ancient Greek θῠρεοειδής ‘Shield-shaped’

thyroid, 14 more

through English thyroid

parathyroid, thyroxine, hyperthyroidism, thyroiditis, 14 more

Today it means

noun The disease state caused by insufficient production of thyroid hormone by the thyroid gland.

Language periods are conventional ranges, not dates for this word.

Etymograph / Proto-Indo-European *weyd- / hypothyroidism