allt

In a sentence

• Allt er gott sem endar vel.

  Everything is good that ends well.

  Here, 'allt' is used as a pronoun meaning 'everything', referring to all things or conditions in general.

• Ég ætla að gera allt sem ég get fyrir þig.

  I'm going to do everything I can for you.

  In this context, 'allt' again functions as a pronoun, emphasizing the entirety or total of actions or possibilities.

• Allt þetta er mjög áhugavert.

  All this is very interesting.

  Here, 'allt' serves as a determiner accompanying 'þetta', enhancing the meaning to encompass the entirety of the referred matter.