中腰

1. Origins, structure, and basic meaning

• Structure: 中腰(ちゅうごし) is a partly bent or crouched posture, between standing fully upright and sitting.
• Basic usage: It describes trying to lift a heavy box from a partly bent position.
  • 中腰で重い箱を持ち上げようとした。

2. Common pitfalls and similar expressions

• Reading 腰
  • The initial sound of 腰(こし) changes in this compound, giving ちゅうごし. 中腰で作業する means working in that posture.