覆る

1. Origins, structure, and basic meaning

• Structure: 覆る, read くつがえる, is a godan intransitive verb for a ruling or physical object being overturned.
• Basic usage: It covers an abstract ruling being reversed and a boat physically capsizing.

2. Common pitfalls and similar expressions

• Contrast with 覆す
  • In 判定が覆る and 小舟が覆る, the affected item is the subject. Transitive 覆す instead presents an agent overturning something.
• Choose the English verb by domain
  • A ruling is overturned or reversed, while a boat capsizes. Keep the abstract and physical senses distinct.