nikt

In a sentence

• Nikt nie przyszedł na spotkanie.

  No one came to the meeting.

  In this sentence, 'nikt' acts as the subject of the sentence and means 'no one', as it refers to an undefined person who did not appear.

• Nic nie rozumiałem, dlatego nikt mi nie pomógł.

  I didn't understand anything, which is why no one helped me.

  Here, 'nikt' is used to reference an absence of someone (anyone) taking the action of helping the speaker.

• Zapytaj o to, ale z nikim o tym nie rozmawiaj.

  Ask about it, but don't talk to anyone about it.

  In this instance, 'nikim' is an inflected form of 'nikt', used in the instrumental case to indicate action involving no specific individual.