續一切經音義 5.71

5.71

關鍵（上古還反說文曰以橫木持門曰關聲類曰關所以閉也切韻扄也說文從門𢇇聲也經文作閞音弁尒雅曰閞謂之槉非關鍵義下其輦反切韻鍵籥字書橫曰關竪曰鍵也）。

Crossbar and bolt (關鍵) (the first character is gu + huan fan [guān]; Shuowen says: "Holding a door with a horizontal beam is called a crossbar (關)." Shenglei says: "A bar is that by which a door is closed." Qieyun: "A door latch." Shuowen: Formed with the men [gate] signific and luan phonetic. The scripture text writes 閞, pronounced bian; Erya says: "閞 is called 槉," not the meaning of crossbar. The second character is qi + nian fan [jiàn]; Qieyun: "The bolt and key of a lock." Character dictionaries: "The horizontal beam is called a crossbar (關); the vertical bolt is called a bolt (鍵)").