The story
- Arabicطَرَحَ (ṭaraḥa)
- Arabicمَطْرَح (maṭraḥ)
- Old Frenchmatras
- Middle Englishmateras
- English todaymattress
From Middle English materas, from Old French matras, from Arabic مَطْرَح (maṭraḥ, “place where something is thrown”), from طَرَحَ (ṭaraḥa, “to throw”). Compare divan, from Persian via Turkish (both of Middle Eastern origin, due to the local custom of lying on padding on floor being foreign to Europeans).
Etymology from Wiktionary, CC BY-SA 4.0.