estonii

In a sentence

• Byłem niedawno w Estonii i podobała mi się tamtejsza atmosfera.

  I was recently in Estonia and liked the atmosphere there.

  Here, the word 'Estonii' is used in the locative case to indicate the location where the action took place.

• Historia Estonii jest bardzo interesująca.

  The history of Estonia is very interesting.

  In this case, 'Estonii' is used in the genitive case to denote possession (the history of Estonia).

• Potrzebuję mapy Estonii podczas podróży.

  I need a map of Estonia during the trip.

  Here, 'Estonii' is in the genitive case, showing the map's relation (of Estonia).