Keyword
younger sister
Info
FrequencyTop 500-600
Type
Kyōiku (2nd grade) 
?
KankenLevel 9
Heisig234
Readings
まい
(22%)
だい
(7%)
Composed of
woman
not yet
Mnemonic

A younger sister is someone that has not yet become a woman.

Used in vocabulary (64 in total)
younger sister
older brother and younger sister
Examples (200 in total)
Those are my sister's books.
It's about your sister.
This is my sister.