This is the 15636th most frequent Polish word.
sukienek
"Sukienek" is the genitive plural form of "sukienka," meaning "dresses."
Here, 'sukienek' is also in the genitive plural form, as it is used after the negated verb 'kupuję' (buy), and negation in Polish often requires the genitive case.
Nie kupuję sukienek, ponieważ ich nie potrzebuję.
I am not buying dresses because I don’t need them.
In this sentence, 'sukienek' again appears in the genitive plural form, as it is used after the expression 'dużo' (a lot), which necessitates the genitive case.
W sklepie widziałam dużo pięknych sukienek.
In the store, I saw a lot of beautiful dresses.
In this sentence, 'sukienek' is a noun in the genitive plural form, used after the numeral 'pięć' (five) as Polish requires genitive plural for quantities above four.