ruch

noun
  1. A pleated, gathered, or ruched strip of fabric used for trimming garments. noun
    The dress was adorned with a ruch along the neckline.
    She added a ruch to the sleeves to give the blouse a more elegant look.
  2. To gather or pleat fabric in a decorative way. verb
    She decided to ruch the fabric to create a more textured appearance.
    The designer ruched the hem of the skirt for a unique finish.