efficace

In a sentence

• Ce médicament est très efficace contre la douleur.

  This medication is very effective against pain.

  The word 'efficace' is here used as an adjective to describe how the medication works efficiently to relieve pain.

• Il est important d'être efficace lorsqu'on travaille sous pression.

  It is important to be efficient when working under pressure.

  In this context, 'efficace' refers to being able to accomplish tasks quickly and effectively.

• Cette méthode d'apprentissage est particulièrement efficace pour les débutants.

  This learning method is particularly effective for beginners.

  Here, 'efficace' describes the method's ability to achieve desired outcomes in teaching beginners.