morzu

In a sentence

• Spaceruję po plaży nad morzu.

  I stroll on the beach by the sea.

  In this sentence, 'morzu' is used as the locative case, indicating a location near the sea.

• Zbieram muszle na morzu.

  I collect shells on the sea.

  Here, 'morzu' is in the locative case, describing the location as on or at the sea.

• Rozmawiamy o zachodzie słońca nad morzu.

  We talk about the sunset over the sea.

  In this example, 'morzu' also takes the locative case, referring to a location in context with the sunset over the sea.