Etymograph

English

antithyroid

Antithyroid 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 1946antithyroid1

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, English antithyroid
  2. Earliest quotation in Wiktionary’s entry: 1946, E. M. Bavin, Antithyroid Activity of Thiouracil Derivatives: “A RECENT report by Anderson et al. on the…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*weyd-Wiktionary, English antithyroid‘to see’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*wéydosWiktionary, English antithyroid‘seeing’reconstructed
  3. Proto-Hellenicc. 2200–1600 BCE*wéidosWiktionary, English antithyroidreconstructed
  4. Ancient Greekc. 800–300 BCEεἶδοςWiktionary, English antithyroideîdos
  5. Ancient Greekc. 800–300 BCEθῠρεοειδήςWiktionary, English antithyroidthŭreoeidḗs‘Shield-shaped’
  6. New LatinmodernthyreoīdēsWiktionary, English antithyroid
  7. English1500–presentthyroidWiktionary, English antithyroid
  8. Englishearliest quotation 1946antithyroidWiktionary, English antithyroid. Earliest quotation in Wiktionary’s entry: 1946, E. M. Bavin, Antithyroid Activity of Thiouracil Derivatives: “A RECENT report by Anderson et al. on the…”

The story

Coined in 1908 from anti- + thyroid.

Full etymology on Wiktionary

Linked words

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

story, guy, video, idea, review, evidence, advice, visit, provide, interview, vision, guide, historic, witness, wisdom, visa, advise, invisible, wizard, historian, wit, vista, evident, visibility, wisely, revise, guise, witty, prudent, envious, jurisprudence, unwise, prudence, revue, avis, improvise, purview, druid, vide, 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, sigmoid, hyoid, 49 more

through English thyroid

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

Today it means

adj Reducing the production or effects of thyroid hormones.

Sources

Sources: Wiktionary, “antithyroid”. 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- / antithyroid

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