sencillas

In a sentence

• Las habitaciones de ese hostal son muy sencillas.

  The rooms in that hostel are very simple.

  The word "sencillas" describes the rooms as modest or basic in style or features.

• Prefiero recetas sencillas para cocinar en casa.

  I prefer simple recipes for cooking at home.

  Here, "sencillas" characterizes the recipes as easy or uncomplicated to prepare.

• Ella siempre viste ropa sencilla pero elegante.

  She always wears simple but elegant clothing.

  In this sentence, "sencilla" (singular form) implies understated or modest styling in clothing choice.