zapalenia

In a sentence

• Mam zapalenie oskrzeli.

  I have bronchitis.

  Here, 'zapalenie' is used as a medical condition, specifically an inflammation.

• Zapalenie świec raczej nie było dobrym pomysłem.

  Lighting the candles was probably not a good idea.

  Here, 'zapalenie' refers to the act of lighting something.

• Ustalono, że przyczyną był pożar spowodowany zapaleniem się suchej trawy.

  It was determined that the cause was a fire triggered by the ignition of dry grass.

  In this context, 'zapalenie' indicates the ignition or catching fire of an object.