jeziorze

In a sentence

• W jeziorze pływają ryby.

  There are fish swimming in the lake.

  The word "jeziorze" is the Polish locative case of "jezioro" (lake), used here to indicate the location where the action is happening.

• Codziennie rano spaceruję nad jeziorzem.

  Every morning, I walk along the lake.

  The word "jeziorzem" appears incorrectly here; for proper grammar, "jeziorze" should have been used. Correctly: 'Codziennie rano spaceruję nad jeziorze.'

• Dzieci bawiły się na brzegu jeziora.

  The children were playing on the shore of the lake.

  Here, "jeziora" is the genitive case of "jezioro", used to describe possession or association with the shore.