This is the 456th most frequent Lithuanian word.
prekių
"Prekių" means "goods" or "products" in English.
The word "prekių" here is used in the genitive plural form to indicate possession or association, implying "of goods".
Prekių lentynos parduotuvėje buvo pilnos.
The shelves of goods in the store were full.
The word "prekių" is used here in the genitive plural form, linking it to "kainų sąrašas", specifying "of goods".
Kainų sąrašas prekių buvo ilgas.
The price list of goods was long.
In this context, "prekių" is in the genitive plural form to complement "daugybę", which is a noun requiring its complement in the genitive case.