倍返し

1. Origins, structure, and basic meaning

• Structure: 倍返し is read as ばいがえし and can mean “double repayment” or “paying back double”, depending on context.
• Basic usage: The examples show repaying kindness twofold and retaliating at twice the measure.

2. Common pitfalls and similar expressions

• Distinguishing senses and uses
  • It means returning twice what one received and can describe generous repayment or retaliatory payback.