podwójnych
Podwójnych is a form of the Polish adjective podwójny, meaning "double" or "twofold." It is specifically the genitive plural and the locative plural form used when the noun it modifies is plural and governed by those cases. Polish adjectives decline to reflect gender, number, and case, so podwójnych appears in contexts where the noun is plural and in genitive or locative position.
In practice, podwójnych occurs in phrases such as brak podwójnych standardów (there are no double standards)
Etymologically, podwójnych derives from podwójny, an adjective built on the root related to the number two