into private...Used before a feminine noun in the accusative case, as in в частную школу (to a private school) or в частную жизнь (into private life). The related form в частной means “in a private...” before a feminine noun.
RU: Он не хотел вмешиваться в частную жизнь коллег.
EN: He didn’t want to interfere in his colleagues’ private life.