kamienia

In a sentence

• Mam kawałek kamienia w ręce.

  I have a piece of stone in my hand.

  Here, 'kamienia' is used in the form of a genitive singular to indicate possession or a partitive aspect.

• Nie mogę podnieść tego kamienia; jest za ciężki.

  I cannot lift this stone; it is too heavy.

  In this context, 'kamienia' signifies the direct object, being in the genitive case due to the negation in the sentence.

• Na szczycie góry znajdziesz starego kamienia.

  At the mountain's peak, you will find an old stone.

  Here, 'kamienia' appears in a poetic manner in the genitive case, perhaps signifying its existence or location in a stylistically elaborate form.