a narrow piece of cloth like a short curtain that hangs around the frame of a bed, under a shelf, etc. （床架等四周的）短帷幔，布帘 
- (especially North American English) (also pelmet British and North American English)
a narrow piece of wood or cloth above a window that hides the curtain rail （床架等四周的）短帷幔，布帘
Word Originlate Middle English: perhaps Anglo-Norman French, from a shortened form of Old French avaler ‘descend’, from a val ‘down’ (literally ‘in the valley’).