gdyni

In a sentence

• Byłem w Gdyni na wakacjach.

  I was in Gdynia on vacation.

  Here, 'Gdyni' is the locative case form of the proper noun 'Gdynia' (a city in Poland), used to specify the location of an action.

• Spacerowałem ulicami Gdyni, podziwiając architekturę.

  I walked through the streets of Gdynia, admiring the architecture.

  In this example, 'Gdyni' again is in the locative case, indicating the place where the action is happening.

• Historia Gdyni jest pełna ciekawych wydarzeń.

  The history of Gdynia is full of interesting events.

  Here, 'Gdyni' is in the genitive case, which often denotes possession or association; it describes 'history' as belonging or relating to 'Gdynia'.