手首

1. Origins, structure, and basic meaning

• Structure: 手首 (てくび) combines hand 手 and neck-like joint 首 to denote the wrist.
• Basic usage: It is the joint that can be sprained in a fall and around which a watchband is fitted.

2. Common pitfalls and similar expressions

• The joint rather than the whole hand
  • 手首 specifically identifies the connection between hand and forearm, not the palm or fingers.