isäntiensä
The Finnish word "isäntiensä" is a possessive form. It is the genitive plural of "isäntä," which means "host," "master," "landlord," or "owner." Therefore, "isäntiensä" translates to "their host," "their master," "their landlord," or "their owner." The "-nsä" suffix indicates a third-person possessive, referring back to a plural subject or a group of people.
For example, in the sentence "He puhuivat isäntiensä kanssa" (They spoke with their hosts), "isäntiensä" clearly