árin

In a sentence

• Árin líða hratt þegar maður hefur gaman.

  The years pass quickly when one is having fun.

  The word 'árin' here is used as the subject of the sentence in its plural nominative form, referring to multiple years.

• Ég hef lifað í níu ár hér, og árin hafa verið stórbrotnir.

  I have lived here for nine years, and the years have been magnificent.

  The word 'árin' is used in the context of summing up an experience, highlighting the properties of multiple specific years represented as a subject.

• Á ég hefur flytja alltaf betur fram ár eftir ár, því að árin kenna mér mikið.

  I strive to improve year by year, because the years teach me a lot.

  Here 'árin' is plural and used to denote the agent (years as entities) contributing to the subject's personal growth.