gusseting

noun
  1. the act or process of inserting gussets (triangular or diamond-shaped pieces of fabric) into a garment or material to add strength, flexibility, or width
  2. Usage: common in sewing and garment construction
verb
  1. present participle of gusset; to insert a gusset or gussets into a garment or material
  2. Usage: transitive verb

Examples