duvet
/ˈdjuːveɪ/noun
1- chiefly Brit. a soft quilt filled with down, feathers, or a synthetic fibre, used instead of an upper sheet and blankets〈主英〉羽绒被。
1.1
- （亦作duvet jacket）a thick down-filled jacket worn by mountaineers（登山运动员所穿的）羽绒服。
词源
mid 18th cent.: from French, literally 'down' （see DOWN 2）.