This is the 4535th most frequent Polish word.
kwadratowych
"Kwadratowych" means "square" (as in units of area, e.g., square meters).
Here, "kwadratowych" is used to describe the unit of measurement for area, "square meters."
Mieszkanie ma powierzchnię pięćdziesięciu metrów kwadratowych.
The apartment has an area of fifty square meters.
In this sentence, "kwadratowych" is used to express the area dimension of the table, again referring to "square meters."
Kupiliśmy stół o wymiarach dwóch metrów kwadratowych.
We bought a table with dimensions of two square meters.
The term "kwadratowych" here indicates the unit of area measurement for the park, "square meters."