Etymograph

English

dysthyroidism

Dysthyroidism 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-1‘to see’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*wéydos1‘seeing’reconstructed
  3. Proto-Hellenicc. 2200–1600 BCE*wéidos1reconstructed
  4. Ancient Greekc. 800–300 BCEεἶδος1eîdos
  5. Ancient Greekc. 800–300 BCEθῠρεοειδής1thŭreoeidḗs‘Shield-shaped’
  6. New Latinmodernthyreoīdēs1
  7. English1500–presentthyroid1
  8. Englishearliest quotation 2009dysthyroidism1

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, English dysthyroidism
  2. Earliest quotation in Wiktionary’s entry: 2009, R Daher, Consequences of dysthyroidism on the digestive tract and vis: “Dysthyroidism, whether in excess or deficiency, has clinical manifestations…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*weyd-Wiktionary, English dysthyroidism‘to see’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*wéydosWiktionary, English dysthyroidism‘seeing’reconstructed
  3. Proto-Hellenicc. 2200–1600 BCE*wéidosWiktionary, English dysthyroidismreconstructed
  4. Ancient Greekc. 800–300 BCEεἶδοςWiktionary, English dysthyroidismeîdos
  5. Ancient Greekc. 800–300 BCEθῠρεοειδήςWiktionary, English dysthyroidismthŭreoeidḗs‘Shield-shaped’
  6. New LatinmodernthyreoīdēsWiktionary, English dysthyroidism
  7. English1500–presentthyroidWiktionary, English dysthyroidism
  8. Englishearliest quotation 2009dysthyroidismWiktionary, English dysthyroidism. Earliest quotation in Wiktionary’s entry: 2009, R Daher, Consequences of dysthyroidism on the digestive tract and vis: “Dysthyroidism, whether in excess or deficiency, has clinical manifestations…”

A compound of dys- + thyroid + -ism

Proto-Indo-European *dus- ‘bad’

Proto-Hellenic *dus- ‘bad’

English dys-

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

Linked words

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

guy, story, video, idea, review, evidence, visit, provide, advice, interview, guide, witness, vision, historic, wisdom, invisible, visa, wit, advise, wizard, evident, visibility, historian, witty, wisely, prudent, vista, revise, guise, envious, prudence, revue, unwise, purview, druid, improvise, vide, twit, avis, voyeur, 103 more

through Proto-Indo-European *wéydos ‘seeing’

wise, 47 more

through Proto-Hellenic *wéidos

eidolon, steroidal, 47 more

through Ancient Greek εἶδος

idol, tabloid, steroid, idyll, trapezoid, colloid, hyoid, sigmoid, 49 more

through Ancient Greek θῠρεοειδής ‘Shield-shaped’

thyroid, 13 more

through English thyroid

hypothyroidism, parathyroid, thyroxine, hyperthyroidism, thyroiditis, 13 more

Today it means

noun An abnormal functioning of the thyroid gland, referring to either hyperthyroidism or hypothyroidism (thyroid hormone deficiency or excess).

Sources

Sources: Wiktionary, “dysthyroidism”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

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

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