義弟
also: おとうと
Meanings
1
younger brother-in-law
Refers specifically to a male in-law in a younger-brother position: one's spouse's younger brother, or one's younger sister's husband.
My wife's younger brother, that is, my brother-in-law, is coming this weekend.
My younger sister's husband is also my brother-in-law.
2
younger stepbrother
rare term
Rare use for a younger stepbrother. In everyday speech, 義理の弟 is often clearer and more natural for this relationship.
After my father remarried, I got a younger stepbrother.
Usage patterns
- 〈人〉の義弟someone's younger brother-in-law
Her younger brother-in-law is a college student.
- 義弟にあたるto be (someone's) younger brother-in-law
This person is my younger brother-in-law.