This is the 5222nd most frequent Polish word.
ratownikami
"Rescuers" or "lifeguards" (instrumental plural form).
The word 'ratownikami' is used in the instrumental plural form to describe who the lifeguards are, providing a definition.
Ratownikami są osoby odpowiedzialne za bezpieczeństwo osób na basenie.
Lifeguards are the people responsible for the safety of individuals at the pool.
Here, 'ratownikami' is used in the instrumental plural form accompanying the verb to meet with whom.
Spotkałem się z ratownikami, aby omówić zasady bezpieczeństwa.
I met with the lifeguards to discuss safety rules.
In this sentence, 'ratownikami' appears in the instrumental plural form as a means to indicate the role or agent providing care.