mattress

Từ điển Oxford Advanced Learner 8th

mat·tress [mattress mattresses] BrE [ˈmætrəs] NAmE [ˈmætrəs] noun
the soft part of a bed, that you lie on
•a soft/hard mattress
•We can sleep on a mattress on the floor.

Word Origin:
Middle English: via Old French and Italian from Arabic maṭraḥ ‘carpet or cushion’, from ṭaraḥa ‘to throw’.

Example Bank:
•The children slept on mattresses on the floor.
•an old bed with a lumpy mattress