おとうと
otōto

Noun

1. younger brother; little brother; kid brother

Related to
かれ わたくし おとうと ちがえた。
karewa watashito otōtō torichigaeta
He mistook me for my younger brother.
Noun

2. brother-in-law (spouse's younger brother or younger sister's husband)

Related to 義弟
Noun

3. pupil; apprentice

Archaic
Other forms: