sumnje

In a sentence

• Nemam nikakvih sumnji u tvoje sposobnosti.

  I have no doubts about your abilities.

  Here, 'sumnji' is used in the genitive plural form to convey the absence of doubt about someone's abilities.

• Sumnja je početak mudrosti.

  Doubt is the beginning of wisdom.

  The word 'sumnja' is used as a subject in its singular nominative form to signify a general concept.

• Njegovo ponašanje bilo je razlog mojih sumnji.

  His behavior was the reason for my doubts.

  In this sentence, 'sumnji' is employed in the genitive plural form to indicate the cause of someone's doubts.