錠

1. Origins, structure, and basic meaning

• Structure: 錠 is read as じょう and denotes a lock on a door or cabinet, while after a number it serves as a counter for medicinal tablets.
• Basic usage: Releasing a cupboard lock appears in 戸棚の錠を外す, while taking one tablet appears in 一錠飲む.

2. Common pitfalls and similar expressions

• A lock and a tablet counter
  • Context distinguishes the standalone noun for a locking mechanism from its use in a quantity such as 一錠 for one medicinal tablet.
• Difference from 鍵
  • Unlike the word for a key or for locking in general, this term denotes the locking mechanism itself or serves as the tablet counter.