negras

In a sentence

• Las noches son negras y misteriosas.

  The nights are black and mysterious.

  The word 'negras' is used as an adjective describing 'noches' (nights) to convey the color and ambiance.

• Ella prefiere las chaquetas negras sobre las azules.

  She prefers black jackets over blue ones.

  Here, 'negras' acts as a descriptive adjective, modifying 'chaquetas' (jackets) to indicate their color.

• Mis pensamientos a veces se tornan negras cuando estoy triste.

  My thoughts sometimes turn black when I'm sad.

  In this case, 'negras' metaphorically describes 'pensamientos' (thoughts), signaling a darker, somber mood or feeling.