Chou Collection, Lower Volume
Radical: Woman (nǚ)
Sao
Kangxi strokes: 13
Page 268, Entry 34
Tang Rhymes (Tangyun), Collected Rhymes (Jiyun), and Rhyme Compilation (Yunhui) define the pronunciation as sao (rising tone).
Shuowen Jiezi explains that the term refers to the elder brother's wife. Furthermore, Explaining Names (Shiming) states that the term derives from the concept of being elderly, suggesting that when people and things age, they naturally shrink in size compared to their original state. It is also pronounced sou (rising tone) when following a specific rhyme scheme.
Questions of Heaven (Tianwen) in Songs of Chu (Chuci) records: What did Jiao seek from his sister-in-law while inside the house? Why did Shaokang set dogs upon him, leading to his fall and death?