eyjar

In a sentence

• Eyjar eru umkringdar sjó.

  Islands are surrounded by the sea.

  Here, "eyjar" is used to refer to islands collectively as plural.

• Ég hef heimsótt margar eyjar í sumar.

  I visited many islands this summer.

  In this sentence, "eyjar" is used in the accusative plural form to indicate islands as the object of the sentence.

• Sögurnar segja frá dularfullum eyjum.

  The stories tell of mysterious islands.

  This usage positions "eyjum" as the dative plural form, signifying the object of an action or preposition.