hypothyroidism

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/ˌhaɪpəˈθaɪɹɔɪˌdɪzəm//ˌhaɪpəʊˈθaɪɹɔɪˌdɪzəm/

noun

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

Similar
underactive thyroidlow thyroid
Opposite
hyperthyroidism
OriginEnglish thyroid ← New Latin thyreoīdēs ← Ancient Greek θῠρεοειδής (thŭreoeidḗs) →
Less commonFirst used 1900sScrabble 31
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Meanings

nounhypothyroidism (countable and uncountable, plural hypothyroidisms)

plural hypothyroidisms

  1. countableuncountablemedicineThe disease state caused by insufficient production of thyroid hormone by the thyroid gland.First known use 1900s

    Synonyms: underactive thyroid, low thyroid · Antonyms: hyperthyroidism

Synonyms & antonyms

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

Similar
underactive thyroidlow thyroid
Opposite
hyperthyroidism

More synonyms by meaning

nounan underactive thyroid gland; a glandular disorder resulting from insufficient production of thyroid hormones

Opposite
hyperthyroidism
Broader
glandular diseasegland diseaseglandular disorder
Also see
low thyroidunderactive thyroid

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*upó
  2. Ancient Greekῠ̔πό (hŭpó)
  3. Ancient Greekὑπο- (hupo-)
  4. Englishhypo-
  5. Proto-Indo-European*dʰwer-
  6. Proto-Hellenic*tʰurā
  7. Ancient Greekθῠ́ρᾱ (thŭ́rā)
  8. Ancient Greekθῠρεός (thŭreós)
  9. Proto-Indo-European*weyd-
  10. Proto-Indo-European*wéydos
  11. Proto-Hellenic*wéidos
  12. Ancient Greekεἶδος (eîdos)
  13. Ancient Greekθῠρεοειδής (thŭreoeidḗs)
  14. New Latinthyreoīdēs
  15. Englishthyroid
  16. Englishhypothyroidism

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

Full word history & related roots →

Translations

Arabic قُصُور اَلدَّرَقِيَّة
  • قُصُور اَلدَّرَقِيَّة (quṣūr ad-daraqiyya)disease state
Catalan hipotiroïdisme
  • hipotiroïdismedisease state
Chinese Mandarin 甲狀腺功能減退症 /甲状腺功能减退症, 甲狀腺功能減退 /甲状腺功能减退
  • 甲狀腺功能減退症 /甲状腺功能减退症 (jiǎzhuàngxiàn gōngnéng jiǎntuì zhèng)disease state
  • 甲狀腺功能減退 /甲状腺功能减退 (jiǎzhuàngxiàn gōngnéng jiǎntuì)disease state
  • 甲減 /甲减 (jiǎjiǎn)disease state
Czech hypotyreóza
  • hypotyreózadisease state
Esperanto hipotiroidismo
  • hipotiroidismodisease state
Estonian kilpnäärme alatalitlus, hüpotüreoos
  • kilpnäärme alatalitlusdisease state
  • hüpotüreoosdisease state
Finnish kilpirauhasen vajaatoiminta
  • kilpirauhasen vajaatoimintadisease state
French hypothyroïdisme
  • hypothyroïdismedisease state
German Hypothyreose
  • Hypothyreosedisease state
Greek υποθυρεοειδισμός
  • υποθυρεοειδισμός (ypothyreoeidismós)disease state
Hebrew תת פעילות של בלוטת התריס
  • תת פעילות של בלוטת התריס (tat peilut shel balutat hatris)disease state
Hungarian pajzsmirigy-alulműködés
  • pajzsmirigy-alulműködésdisease state
Irish hipitíoróideacht
  • hipitíoróideachtdisease state
Italian ipotiroidismo
  • ipotiroidismodisease state
Japanese 甲状腺機能低下症
  • 甲状腺機能低下症 (kōjōsen kinō teikashō)disease state
Korean 갑상샘저하증
  • 갑상샘저하증 (gapsangsaemjeohajeung)disease state
Polish niedoczynność tarczycy
  • niedoczynność tarczycydisease state
Portuguese hipotiroidismo
  • hipotiroidismodisease state
Russian гипотирео́з
  • гипотирео́з (gipotireóz)disease state
Spanish hipotiroidismo
  • hipotiroidismodisease state
Swedish hypotyreos
  • hypotyreosdisease state
Vietnamese sự giảm hoạt động của tuyến giáp
  • sự giảm hoạt động của tuyến giápdisease state
Welsh isthyroidedd
  • isthyroidedddisease state
Cite this entry
APA

hypothyroidism. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/hypothyroidism

MLA

“hypothyroidism.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/hypothyroidism. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “hypothyroidism,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/hypothyroidism.

Source: hypothyroidism on Wiktionary, CC BY-SA 4.0.