Lock: Su ㄙㄨㄛˇ. "Lock" is simplified as "lock". Save strokes and simplify them according to ancient calligraphy. "Shuo Wen Jie Zi": "Lock, door key also. From Jin Sheng (). [ 1]"。 Metal door key device is a model of lock.
Original meaning: a metal device added to the opening or joint of doors, windows, utensils, etc. And can only be opened with keys, passwords, magnetic cards, etc. Such as: door lock, password lock, lock key.