powodu

In a sentence

• Nie mogę przyjść z powodu choroby.

  I cannot come due to illness.

  Here, 'z powodu' is used to indicate the reason for an action, translated as 'due to' in English.

• Byłem smutny bez powodu.

  I was sad without a reason.

  In this sentence, 'bez powodu' means 'without a reason,' indicating a lack of a specific cause.

• Z jakiego powodu spóźniłeś się na spotkanie?

  For what reason were you late to the meeting?

  Here, 'z jakiego powodu' is a phrase that means 'for what reason,' used to inquire about the cause or reason for something.