noun
Refers to a piece of furniture with shelves for storing books. Can be used for a single shelf or a whole bookcase.
本棚に本を並べる。
I arrange books on the bookshelf.
新しい本棚を買った。
I bought a new bookcase.
More formal and often used for library stacks or large shelving units, while 本棚 is the everyday word for a bookshelf at home or in an office.
Compound of 本 (book) and 棚 (shelf).