السبب

In a sentence

• السبب وراء نجاحه هو الاجتهاد.

  The reason behind his success is diligence.

  The word "السبب" is used here to indicate the cause or justification for an event or outcome.

• لا أعرف السبب الذي جعلك تتأخر.

  I don't know the reason that made you late.

  In this sentence, "السبب" is used to refer to an underlying cause or explanation for someone's action.

• هل يمكن أن تخبرني السبب من فضلك؟

  Can you tell me the reason, please?

  Here, "السبب" is a direct question asking for the explanation or cause of something.