Swiss darning goes by two names because it does two jobs. Call it duplicate stitch when you're adding a motif to a finished piece. Call it Swiss darning when you're covering a mistake. Either way, the technique is the same: a tapestry needle tracing the path of existing stitches, laying new yarn exactly over the old, stitch by stitch.
The result is indistinguishable from knitted-in colorwork. A moth hole becomes a deliberate flower. A color you regret becomes a stripe you intended. A plain sweater bought three years ago becomes the one you embellished yourself.
No loom, no machine, no unraveling. Just a needle, a length of contrast yarn, and the quiet satisfaction of improving something that already exists.
