The story
- Proto-Indo-European*tr̥-
- Proto-Indo-European*ped-
- Proto-Indo-European*pṓds
- Proto-Indo-European*tr̥-ped-ih₂-
- Ancient Greekτράπεζα (trápeza)
- Proto-Indo-European*weyd-
- Proto-Indo-European*wéydos
- Proto-Hellenic*wéidos
- Ancient Greekεἶδος (eîdos)
- Ancient Greekτρᾰπεζοειδής (trăpezoeidḗs)
- New Latintrapezoïdē
- English todaytrapezoid
Learned borrowing from New Latin trapezoïdēs. By surface analysis, trapeze + -oid. First attested in 1704.
Etymology from Wiktionary, CC BY-SA 4.0.