fisk

In a sentence

• Ég veiddi stóran fisk í gær.

  I caught a big fish yesterday.

  In this sentence, 'fisk' is used as a noun in its singular form, referring to a specific fish that was caught.

• Við borðum fisk oft í kvöldmat.

  We often eat fish for dinner.

  Here, 'fisk' is also used as a noun in its singular form, representing fish as a type of food.

• Fiskurinn í þessum á er mjög marglitaður.

  The fish in this river is very colorful.

  In this instance, 'fiskurinn' is the definite singular form of the noun 'fisk', referring specifically to 'the fish' in the context.