反則

1. Origins, structure, and basic meaning

• Structure: 反則 is read はんそく and means breaking the rules of a game or activity.
• Basic usage: It is used when pointing out a foul or checking which actions violate the rules.

2. Common pitfalls and similar expressions

• Rules and mistakes
  • 失敗 broadly describes failure or an unsuccessful action. 反則 focuses on whether a rule was broken.
• Action and classification
  • 反則をする means committing a foul.
  • 反則になる describes an action counting as a foul under the rules.