悔いる

1. Origins, structure, and basic meaning

• Structure: Spelling: 悔いる. Reading: くいる. Core meaning: to regret; to repent.
• Basic usage: Representative examples: 彼は感情に任せて友人を傷つけたことを悔いている / 過ぎた選択を悔いるより、次の一歩を考えよう.

2. Common pitfalls and similar expressions

• Object of regret
  • Use it for looking back with regret on an action or choice, as in ことを悔いる. It can carry stronger reflection on a wrong or decision than merely feeling disappointed.