sourdes

In a sentence

• Elle souffre d'une maladie qui l'a rendue sourde.

  She suffers from an illness that made her deaf.

  Here, 'sourde' refers to the adjective 'deaf', indicating a lack of hearing ability in the feminine form.

• Ils ont passé de nombreuses années avec des oreilles sourdes face aux critiques.

  They spent many years with deaf ears to criticism.

  In this sentence, 'sourdes' metaphorically describes being indifferent or not responsive to criticism, using the plural form to fit 'oreilles'.

• Les tambours étouffés donnaient un son sourd lors de la parade.

  The muffled drums produced a dull sound during the parade.

  Here, 'sourd' as an adjective describes a sound that is muted or not sharp, giving a different sensory quality.