What does it mean to darn in knitting?
Darning is a sewing technique for repairing holes or worn areas in fabric or knitting using needle and thread alone. It is often done by hand, but it is also possible to darn with a sewing machine.
How do I fix an unraveling knitted sweater?
Coat the frayed edges on your sweater such as sleeves or the bottom circumference of the sweater with clear nail polish. Let the polish dry. Turn the sweater inside out. Turn the edging up twice so that all the fraying is covered and pin in place with straight pins.