異常

1. Origins, structure, and basic meaning

• Structure: 異常 is read as いじょう and means “abnormality” and “malfunction”.
• Basic usage: It refers to checking abnormal movement and a warning lamp indicating a machine malfunction.

2. Common pitfalls and similar expressions

• 動きに異常がある / 機械の異常
  • Use 動きに異常がある for abnormal behavior and 機械の異常 for equipment malfunction.