grein

In a sentence

• Ég las nýlega áhugaverða grein í dagblaðinu.

  I recently read an interesting article in the newspaper.

  Here, 'grein' is used to mean 'article' as in a written work or piece of journalism.

• Nám er flókin grein sem krefst mikillar einbeitingar.

  Study is a complex field that requires a lot of focus.

  In this sentence, 'grein' refers to a 'field' or 'branch' of study or expertise.

• Ég sá grein af eikinni sem hafði brotnað í storminum.

  I saw a branch from the oak tree that had broken in the storm.

  In this context, 'grein' means a 'branch' of a tree.