dąbiu

In a sentence

• W gęstym dąbiu schroniły się zwierzęta przed burzą.

  In the dense oak forest, the animals took shelter from the storm.

  Here, 'dąbiu' is the locative singular form of 'dąb', referring to 'oak' or a collection of oak trees (forest).

• Dąbiu, czy mógłbyś mi pomóc z tym projektem?

  Dąbiu, could you help me with this project?

  In this context, 'Dąbiu' is a vocative singular form, addressing someone whose name or nickname is 'Dąb'.

• Młody dąb wyrósł na polu, a jego gałęzie sięgały wysoko.

  A young oak grew in the field, and its branches reached high.

  'Dąb' is used here nominally as the subject of the sentence, referring to the oak tree. This provides an example of its nominative singular form.