This is the 6631st most frequent Polish word.
dolnych
"Lower" or "bottom" (genitive plural form in Polish).
The word "dolnych" is an adjective in the genitive plural form, modifying the noun "partiach" (parts). It indicates that these parts are situated in a lower or bottom area.
W dolnych partiach lasu rosną paprocie.
In the lower parts of the forest, ferns grow.
"Dolnych" here describes "pięter" (floors), indicating its location within a building and is in the genitive plural form due to the context.
Mieszkańcom dolnych pięter zaproponowano przeniesienie.
Residents of the lower floors were offered relocation.
In this context, "dolnych" modifies "gałęzi" (branches), describing their relative location in comparison to the rest of the tree, again in genitive plural.