婿養子

1. Origins, structure, and basic meaning

• Structure: In 婿養子 (むこようし), son-in-law 婿 and adopted son 養子 combine in one family-role term.
• Basic usage: 婿養子 denotes a man who becomes both a son-in-law through marriage and an adopted son in the spouse's family.

2. Common pitfalls and similar expressions

• A combined marital and adoptive relation
  • Its scope is narrower than either son-in-law or adopted son alone.