This is the 241st most frequent Polish word.
danych
The Polish word "danych" means "data" (genitive or locative plural form).
In this sentence, 'danych' is used as a genitive plural form of 'dane', indicating possession or relation to the analysis.
Danych potrzebnych do analizy nie udało się zebrać.
The data needed for the analysis could not be collected.
Here, 'danych' is in the genitive plural form, showing what kind of privacy is being assured—privacy of the data.
Program musi chronić prywatność zgromadzonych danych.
The program must protect the privacy of the collected data.
In this sentence, 'danych' is again in the genitive plural form, used as the object of the negation term 'brak', consistent with Polish grammar rules.