This is the 6452nd most frequent Polish word.
chleba
"Chleba" means "bread" in English.
The word "chleba" here is used in the genitive case to indicate the absence of bread.
Nie mam chleba w domu.
I don't have any bread at home.
Here, "chleba" is also in the genitive case, referring to a specific loaf of bread.
Kupiłem bochenek chleba.
I bought a loaf of bread.
In this sentence, "chleba" is used in the genitive case as part of a genitive phrase to describe the quality of the bread's smell.