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adopted daughter; foster daughter
彼らは養女としてその子を引き取った。
They took in that child as their adopted daughter.
古い商家では、養女が家業を継ぐ例も珍しくなかった。
In old merchant families, it was not uncommon for an adopted daughter to inherit the family business.
彼女は養女に出された過去を知った。
She learned about her past of being given up for adoption.