原因

1. Origins, structure, and basic meaning

• Structure: 原因 is read as げんいん and means “cause”.
• Basic usage: It denotes investigating the cause of failure and identifying a disconnected wire as the reason for no sound.

2. Common pitfalls and similar expressions

• 原因を考える / 原因は線だった
  • Use 原因を考える for investigation and 原因は線だった to identify a determined cause.