nažalost

In a sentence

• Nažalost, koncert je otkazan zbog lošeg vremena.

  Unfortunately, the concert was canceled due to bad weather.

  In this sentence, 'nažalost' is used to express regret or disappointment about the concert being canceled.

• Moram ti reći, nažalost, da nismo prošli na testu.

  I have to tell you, unfortunately, that we didn't pass the test.

  Here, 'nažalost' introduces the unfortunate information about the test result.

• Nažalost, propustio sam priliku da ih upoznam.

  Unfortunately, I missed the opportunity to meet them.

  This sentence uses 'nažalost' to convey regret over missing an opportunity.