This is the 17171st most frequent Polish word.
zachowują
"Zachowują" means "they preserve," "they maintain," or "they behave" depending on context.
In this sentence, 'zachowują' is used to refer to the manner in which the subjects (students) conduct themselves.
Nasi uczniowie zachowują się bardzo grzecznie.
Our students behave very politely.
In this sentence, 'zachowują' is used to indicate that the subjects take/maintain a specific action, in this case, caution.
Zachowują ostrożność podczas niebezpiecznych sytuacji.
They exercise caution during dangerous situations.
Here, 'zachowują' means to maintain or preserve something, indicating an effort to keep traditions.