Chou Collection, Lower Volume Radical: Woman (nǚ) Di Kangxi strokes: 10 Page 263, Entry 08 Pronounced di. Refers to a younger sister. Origins of the Six Writings (Liushugu): In ancient times, when a woman was married, she was accompanied by her niece and younger sister as attendants. All women below the status of the primary wife were referred to as di. Also, pronounced di. Used in the term disi, which refers to the wives of brothers. The wife of an older brother is called a si wife, and the wife of a younger brother is called a di wife. Refer to the previous entry for the character si for mutual clarification.