悔やむ

1. Origins, structure, and basic meaning

• Structure: 悔やむ is read as くやむ and is a transitive verb meaning either to regret a past action or to mourn a death.
• Basic usage: Both senses take を, as in ことを悔やむ for regret and 死を悔やむ for mourning.

2. Common pitfalls and similar expressions

• Difference from 後悔する
  • 後悔する centers on regret over one’s choice or action; 悔やむ additionally has the bereavement sense mourn.
• Inflection
  • The connective stem is 悔やみ, while the て-form is 悔やんで, changing final む to ん.