Etymology

trapezoidal

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Today it means: In the shape of a trapezoid, or having some faces which have one pair of parallel sides. Full definition →

Proto-Indo-European *h₂élisder.? ← English trapezoid ← New Latin trapezoïdē
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The story

  1. Proto-Indo-European*tr̥-
  2. Proto-Indo-European*ped-
  3. Proto-Indo-European*pṓds
  4. Proto-Indo-European*tr̥-ped-ih₂-
  5. Ancient Greekτράπεζα (trápeza)
  6. Proto-Indo-European*weyd-
  7. Proto-Indo-European*wéydos
  8. Proto-Hellenic*wéidos
  9. Ancient Greekεἶδος (eîdos)
  10. Ancient Greekτρᾰπεζοειδής (trăpezoeidḗs)
  11. New Latintrapezoïdē
  12. Englishtrapezoid
  13. Proto-Indo-European*h₂el-
  14. Proto-Indo-European*h₂élisder.?
  15. English todaytrapezoidal

From trapezoid + -al.

Etymology from Wiktionary, CC BY-SA 4.0.