This is the 975th most frequent Polish word.
swoimi
The Polish word "swoimi" means "with one's own" or "with their own" in English, depending on context.
Here 'swoimi' is an instrumental plural form of 'swój', referring to possession or association in the context of 'friends' belonging to the subject.
Przyszedł na przyjęcie ze swoimi przyjaciółmi.
He came to the party with his friends.
In this sentence, 'swoimi' again in instrumental plural, specifies that the plans being discussed and the parents being referred to are hers, showing a possessive connection.
Ona często rozmawia o swoich planach ze swoimi rodzicami.
She often talks about her plans with her parents.
Here 'swoimi' describes something personal ('secrets') in plural and instrumental case, underlining the possessive context of the action.