This is the 140th most frequent Bulgarian word.
своите
"Своите" translates to "one's own" or "their own" in English, depending on context.
In this sentence, "своите" refers to the possessive form of the books belonging to the person being addressed.
Покажи своите книги.
Show your books.
In this case, "своите" signals the possessive form to denote students belonging to the teacher.
Учителката поздрави своите ученици.
The teacher greeted her students.
Here, "своите" indicates the possessive form implying animals that belong to "she."