Etymology

rheumatoid

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Today it means: Involving or pertaining to rheumatism, especially rheumatoid arthritis. Full definition →

Ancient Greek εἶδος (eîdos) ← Proto-Hellenic *wéidos ← Proto-Indo-European *wéydos
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The story

  1. Englishrheumat(ism)
  2. Proto-Indo-European*weyd-
  3. Proto-Indo-European*wéydos
  4. Proto-Hellenic*wéidos
  5. Ancient Greekεἶδος (eîdos)
  6. English todayrheumatoid

From rheumat(ism) + -oid.

Etymology from Wiktionary, CC BY-SA 4.0.