痛恨

1. Origins, structure, and basic meaning

• Structure: 痛恨 is read as つうこん and is a noun for bitter regret or a deeply painful sense about an outcome or action.
• Basic usage: A heartbreaking point appears in 痛恨の一点, while profound regret appears in 痛恨の思い.

2. Common pitfalls and similar expressions

• Competition and personal regret
  • It can describe a point that decided a match or deep regret when looking back on one's own action.
• Difference from 後悔
  • 後悔 broadly means regretting the past; 痛恨 conveys an especially bitter and painful reaction to the result.