妹婿

1. Origins, structure, and basic meaning

• Structure: 妹婿 is read いもうとむこ and means one's younger sister's husband.
• Basic usage: It identifies the family relation of the person bringing food to a gathering or being thanked by the father.

2. Common pitfalls and similar expressions

• Subject of an action
  • 妹婿が料理を持ってきた describes the younger sister's husband bringing food.
• Recipient of thanks
  • 妹婿に礼を言った describes thanking the younger sister's husband.