動作

1. Origins, structure, and basic meaning

• Structure: 動作 (どうさ) is a noun for a concrete movement performed by a person or machine.
• Basic usage: 複雑な動作をする describes movements a machine executes from one button, while 基本の動作を確認する makes a performer’s foundational movements the object reviewed.

2. Common pitfalls and similar expressions

• Machine operation and bodily movement
  • 機械の動作 is device operation, whereas 舞台の動作 is human movement. The noun does not automatically include the action’s purpose or emotion.