This is the 10996th most frequent Polish word.
fałszowaniu
The Polish word "fałszowaniu" translates to "falsifying" or "counterfeiting" in English.
In this sentence, 'fałszowaniu' is used as a noun in the locative case to describe the act of falsifying documents.
Oskarżono go o fałszowaniu dokumentów.
He was accused of falsifying documents.
Here, 'fałszowaniu' is similarly in the locative case, referring to the act of falsifying data or results.
Przyznał się do fałszowaniu wyników eksperymentu.
He admitted to falsifying the experiment results.
In this usage, 'fałszowaniu' relates to an inquiry concerning the falsification actions, again in locative case.