續一切經音義 7.10

7.10

戶樞（下昌朱反爾雅曰樞謂之椳郭璞注云門扉樞機廣雅樞本也謂戶扇轉處說文云從木區聲也）。

戶樞 (The lower character is 昌 + 朱 [shū]; the Erya says: "The pivot (shū) is called wéi"; Guo Pu's commentary says: "The pivot mechanism of the door leaf"; the Guangya says: "Shū means the base"; it refers to the place where the door leaf turns; the Shuowen says: "It is formed from 木 (wood) with 區 as phonetic").