This is the 6677th most frequent Polish word.
dwie
"Two" (feminine form).
The word 'dwie' is used to describe the quantity ('two') of feminine plural nouns ('książki').
Mam dwie książki.
I have two books.
Here, 'dwie' follows the feminine form, although 'jabłka' is neuter plural in this context, showcasing grammatical agreement.
Ona kupiła dwie jabłka.
She bought two apples.
In this sentence, 'dwie' specifies the number of people ('osoby'), which is feminine plural.