This is the 4869th most frequent Polish word.
otwierają
"Open" (they open).
Here, 'otwierają' is used as a third person plural verb describing an action ('opening') performed by 'they'.
Każdego ranka otwierają okna, aby przewietrzyć pokój.
Every morning, they open the windows to air out the room.
In this sentence, 'otwierają' applies to the action of opening something (books) and is associated with the subject 'children'.
Dzieci z ciekawością otwierają nowe książki.
The children eagerly open new books.
Here, 'otwierają' signifies the act of unwrapping or opening presents, pertaining to the festive context and action performed by 'they'.