counterpane
The topmost covering of a bed, often functioning as a blanket.
Near-synonyms: bedcover, bedspread, coverlet, quilt
Where it comes from
By serial alterations in Middle English, Middle French, and Old French, ultimately from Latin words meaning "stitched bedding" (culcita puncta).
Adapted from the Wiktionary entry counterpane (CC BY-SA 4.0).