調子

1. Origins, structure, and basic meaning

• Structure: The noun 調子 (ちょうし) denotes the current condition or working state of a body or machine.
• Basic usage: A machine can have 調子が良い, while physical recovery appears in 体の調子が戻る.

2. Common pitfalls and similar expressions

• Condition of a machine or body
  • It concerns a condition that can vary over time rather than a permanent characteristic.