恩返し

1. Origins, structure, and basic meaning

• Structure: 恩返し is read as おんがえし and is a noun and する verb for repaying a kindness or returning a favor.
• Basic usage: The benefactor appears in 祖父母に恩返しをする, while the purpose of a return appears in 恩返しに来る.

2. Common pitfalls and similar expressions

• Gratitude and action
  • It focuses on responding through an act or gift after receiving help, rather than on the feeling of gratitude alone.
• Difference from お礼
  • お礼 includes words of thanks or a small token; 恩返し more strongly means repaying a significant kindness.