弟（おとうと）— younger brother (my own)
私 の 弟 です。
He’s my younger brother.
弟おとうと
younger brother (my own)
おとうと
accent [4]In detail
Words
私watashiI
のno(possession; 私の = my)
弟otoutoyounger brother
ですdesu(polite sentence ending)
Kanji
弟テイ・
Use 弟 when speaking about your own younger brother. When referring politely to someone else’s younger brother, use 弟さん.
Coco-sensei