なさぬ仲なか

noun, noun which may take the genitive case particle 'no'

unrelated by blood; step-relationship

Refers to a relationship where the people involved are not biologically related, often used in the context of step-families or adoptive relationships. The phrase is somewhat literary and fixed.

• 彼かの女じょはなさぬ仲なかの子こ供どもたちを実じつの子このように育そだてた。

  She raised the children, who were not her own by blood, as if they were her real children.

• なさぬ仲なかだからこそ、気きを遣つかうこともある。

  Precisely because they are not blood-related, there are times when one must be considerate.