martw

In a sentence

• Nie martw się, wszystko jest w porządku.

  Don't worry, everything is fine.

  Here, 'martw' is used in an imperative form instructing someone not to worry.

• Wyglądał na martwego, ale wciąż oddychał.

  He looked dead, but he was still breathing.

  Here, 'martwego' (a form of 'martwy') is used as an adjective describing someone as dead.

• Jej głos brzmiał martwo, bez cienia emocji.

  Her voice sounded dead, without a trace of emotion.

  Here, 'martwo' is used as an adverb describing the manner of her voice, likening it to lifelessness.