probleem

In a sentence

• Mul on üks probleem.

  I have a problem.

  Here, 'probleem' is used as a noun to represent an issue or difficulty that the speaker is encountering.

• See on tõeline probleem.

  This is a real problem.

  In this context, 'probleem' is still a noun but is emphasized by the adjective 'tõeline' (real), highlighting the significance or seriousness of the issue.

• Probleemidega tuleb tegeleda.

  Problems need to be addressed.

  Here, 'probleemidega' is the plural form and in the comitative case of 'probleem,' showing the necessity of dealing with or handling multiple issues.