sempatch
/ˈsɛmpætʃ/
noun
- A small piece of fabric used for testing or mending, especially in sewing or tailoring.
- She cut a sempatch from the scrap bin to test the embroidery stitch.
- He kept a collection of sempatches in his sewing kit for quick repairs.
- The tailor used a sempatch to match the color before repairing the coat.