Archaic term for a quilt or bedding; not used in modern everyday language. The modern word is 掛け布団 (かけぶとん) or simply 布団 (ふとん).
In classical literature, 衾 can refer to bedding.
legendary flying-squirrel monster · Japanese giant flying squirrel · dish with cooked fish and chicken
bog chickweed
The historical derivation is uncertain; the kanji 衾 is conventionally associated with bedding or a quilt in classical contexts.