The story
- Proto-Indo-European*tr̥-
- Proto-Indo-European*ped-
- Proto-Indo-European*pṓds
- Proto-Indo-European*tr̥-ped-ih₂-
- Ancient Greekτράπεζα (trápeza)
- Ancient Greekτρᾰπέζῐον (trăpézĭon)
- Late Latintrapezium
- English todaytrapezium
Learned borrowing from Late Latin trapezium, borrowed from Ancient Greek τρᾰπέζῐον (trăpézĭon, “irregular quadrilateral”, literally “small table”), from τράπεζα (trápeza, “table”) + -ιον (-ion, diminutive suffix). First attested in 1570. Doublet of trapeze.
Etymology from Wiktionary, CC BY-SA 4.0.