This is the 7303rd most frequent Polish word.
kamienia
"Kamienia" means "stone" or "of the stone" (genitive singular form in Polish).
Here, 'kamienia' is used in the form of a genitive singular to indicate possession or a partitive aspect.
Mam kawałek kamienia w ręce.
I have a piece of stone in my hand.
In this context, 'kamienia' signifies the direct object, being in the genitive case due to the negation in the sentence.
Nie mogę podnieść tego kamienia; jest za ciężki.
I cannot lift this stone; it is too heavy.
Here, 'kamienia' appears in a poetic manner in the genitive case, perhaps signifying its existence or location in a stylistically elaborate form.