This is the 11965th most frequent Polish word.
kwestionowana
"Kwestionowana" means "questioned" or "challenged."
In this sentence, "kwestionowana" is used as a past participle to describe the decision being questioned or challenged, emphasizing the action taken by the experts.
Decyzja rządu była szeroko kwestionowana przez ekspertów.
The decision of the government was widely questioned by experts.
Here, "kwestionowana" is used to describe the recurrent action of doubting his knowledge.
Jego wiedza na ten temat jest czasami kwestionowana.
His knowledge on this subject is sometimes questioned.
In this example, "kwestionowana" describes the theory that had been subjected to doubts or questioning, preceding confirmation.