汗かん牛ぎゅう充じゅう棟とう

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Meanings

noun

a vast collection of books

yojijukugo (four-character idiom)

A literary yojijukugo describing an enormous number of books, literally 'sweating oxen and a full house'. Used in formal or written contexts to praise a library or collection.

彼かれの書しょ斎さいはまさに汗かん牛ぎゅう充じゅう棟とうの状じょう態たいだ。
His study is truly a state of 'sweating oxen and a full house'—crammed with books.