This is the 17134th most frequent Polish word.
zaapelować
"Zaapelować" means "to appeal" (to make a formal request or plea).
The verb 'zaapelować' is used here in its literal sense of 'to appeal', usually in formal or official communications, addressing a public or group for action.
Rada miasta postanowiła zaapelować do mieszkańców o oszczędzanie wody.
The town council decided to appeal to residents to save water.
Here, 'zaapelować' conveys making a collective, albeit informal, request to a particular group, urging them to take specific actions.
Zaapelowaliśmy do uczniów, żeby zadbali o porządek w klasach.
We appealed to the students to take care of the cleanliness in classrooms.
In this context, 'zaapelować' shows its use in advocacy, where groups urge entities in power to consider taking actions beneficial to specific causes.