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1. Origins, structure, and basic meaning

• Structure: 曽 has 11 strokes and, in kinship terms, marks a relationship one generation beyond grandparents or grandchildren.
• Basic usage: 曽孫 is read ひまご, and 曽祖父 is read そうそふ.

2. Common pitfalls and similar expressions

• Generation and whole-word readings
  • 曽孫 means the child of a grandchild and can refer to either a boy or a girl.
  • 曽祖父 means the father of a grandparent: a great-grandfather.