怨恨

1. Origins, structure, and basic meaning

• Structure: 怨恨 (えんこん) is a noun for a deep grudge or resentment held over a perceived wrong.
• Basic usage: It describes a grudge between families or an investigation into personal resentment behind an incident.
  • 二つの家の間には長年の怨恨が残っていました。 — A long-standing grudge remained between the two families.
  • 探偵は事件の背景に個人的な怨恨がないか調べました。 — The detective investigated whether personal resentment lay behind the incident.

2. Common pitfalls and similar expressions

• Temporary displeasure and lasting resentment
  • 怨恨 indicates deep, sustained hostility or resentment rather than a momentary annoyance.