黒星

1. Origins, structure, and basic meaning

• Structure: 黒星 (くろぼし) can mean a defeat in competition or a literal black star mark.
• Basic usage: 黒星を喫した is an unexpected loss by a favorite; 黒星を付ける marks an incorrect problem with a black star.

2. Common pitfalls and similar expressions

• Defeat in a record and symbol used for review
  • Although both are objects, 喫する idiomatically means suffering defeat and 付ける literally applies a mark. Context separates figurative and literal readings.