ciemnienie

In a sentence

• Ciemnienie nieba zapowiada nadchodzącą noc.

  The darkening of the sky heralds the approaching night.

  Here, 'ciemnienie' refers to the process of the sky becoming darker, used as a noun and indicating a natural phenomenon.

• Obserwuję ciemnienie metalu podczas reakcji chemicznej.

  I observe the darkening of the metal during the chemical reaction.

  In this sentence, 'ciemnienie' describes the process in which the metal undergoes discoloration, used in a scientific context.

• Ciemnienie świateł w kinie sygnalizuje początek filmu.

  The dimming of lights in the cinema signals the beginning of the movie.

  Here, 'ciemnienie' refers to the intentional process of dimming the lights, used in an observational context.