妹（いもうと）— younger sister (my own)
私 の 妹 です。
She’s my younger sister.
妹いもうと
younger sister (my own)
いもうと
accent [4]In detail
Words
私watashiI
のno(possession; 私の = my)
妹imoutoyounger sister
ですdesu(polite sentence ending)
Kanji
妹マイ・
Use 妹 when speaking about your own younger sister. When referring politely to someone else’s younger sister, use 妹さん.
Coco-sensei