This is the 320th most frequent Polish word.
badań
"Research" or "studies" (genitive plural form of "badania").
Here, "badań" is the genitive plural form of "badanie" used to describe 'research' or 'studies' in a general sense.
Wyniki badań naukowych są obiecujące.
The results of the scientific research are promising.
In this sentence, "badań" again appears in the genitive plural form, indicating possession related to the process of conducting something.
Proces prowadzenia takich badań wymaga czasu.
The process of conducting such studies requires time.
"Badań" here also acts as a genitive plural, referring to the findings derived from a particular scientific context.