WHOLE CHARACTER
妹mèi
younger sister; younger female cousin (表妹); young woman (in set phrases)
妹 is a younger sister, and by extension any younger girl of the same generation.
The dictionary’s detailed entry (and Shuowen) gives 从女、未声: the woman side carries the meaning, 未 the sound.
MEANING
女nǚ
woman; female
Female/woman-related meaning clue.
In 妹: meaning Shown with its documented or clearly limited role.
SOUND
未wèi
not yet
The sound side named in the cached detailed entry for 妹 (从女、未声); wèi shares 妹's final ei and tone 4; the initial differs (w-/m-).
In 妹: sound Sound side per the cached detailed entry: wèi shares 妹's final ei and tone 4; the initial differs (w-/m-).