挙動

1. Origins, structure, and basic meaning

• Structure: The spelling is 挙動, read きょどう, and it combines 挙, suggesting an action, with 動, meaning movement.
• Basic usage: The basic sense of 挙動 covers a person's behavior and the movement or operating behavior shown by a machine or program.

2. Common pitfalls and similar expressions

• Behavior of people and machines
  • Both examples use the form 挙動. For a person it describes noticeable conduct; for a machine it describes an observed operating state.
• Suspicion and instability
  • 店員は客の不審な挙動に気づいた。 — The clerk noticed the customer's suspicious behavior.
  • 更新後の機械に不安定な挙動が見られた。 — The machine behaved erratically after the update.