This is the 17886th most frequent Polish word.
ładnych
"Ładnych" means "nice" or "pretty" in English.
In this sentence, "ładnych" modifies the plural noun "mebli" and describes their aesthetic quality, implying that the furniture is beautiful and attractive.
Kupiliśmy ładnych mebli do salonu.
We bought some nice furniture for the living room.
Here, "ładnych" is used with the plural noun "ptaków" to express the admiration of their appearance or beauty.
W parku widziałem ładnych ptaków.
I saw some nice birds in the park.
In this context, "ładnych" intensifies the meaning of "kilka godzin," emphasizing that it is a notable or substantial number of hours spent.