This is the 1880th most frequent Polish word.
naukowcy
Scientists.
Here, "naukowcy" is used as the subject noun representing individuals involved in scientific research.
Naukowcy badają zmiany klimatyczne.
The scientists study climate change.
In this sentence, "naukowców" is used in the context of an object noun, specifying a group of scientists.
Wczoraj spotkałem grupę naukowców.
Yesterday, I met a group of scientists.
Here, "naukowców" is part of a possessive construction indicating that the work belongs to the scientists.