mattress
/ˈmætrɪs/noun
1- a fabric case filled with deformable or resilient material, used for sleeping on褥垫, 床垫。
1.1
- Engineering a flat structure of brushwood, concrete, or other material used as strengthening or support for foundations, embankments, etc.【工程】垫层; 沉排; 钢筋网。
词源
Middle English: via Old French and Italian from Arabic matṛa 'carpet or cushion', from tạrahạ 'to throw'.