животу

In a sentence

• У мом животу сам учио како да будем стрпљив.

  In my life, I have learned how to be patient.

  Here, 'животу' means 'life' in the context of someone's entire life experience.

• Она је посветила својој каријери читав свој животу.

  She devoted her whole life to her career.

  In this sentence, 'животу' is used in a possessive context, indicating what was dedicated -- her life.

• Животи као што су ови уче нас важним лекцијама.

  Lives such as these teach us important lessons.

  Here, 'животи' (nominative plural of 'живот') refers to multiple instances or forms of life, illustrating variety or example.