library
圕 centers on a library: a place where books are kept. It is a single-concept kanji with no extended abstract senses.
圕 is a modern Japanese kokuji (国字) created by combining 囗 (enclosure) with 書 (writing/book) to represent a library as a place that contains books. It is not derived from ancient Chinese characters.
The outer enclosure 囗 is a building, and inside is 書 (book). Picture a building full of books: that is a library.
For ショ, imagine a small (ショ) library enclosed in a cozy building: the word 'small' sounds like ショ, and the library is a small, book-filled space.