What is darn?

"Darn" is commonly used as a replacement for swear words and cursing. It can also mean to mend or repair a hole or tear in fabric by weaving or sewing. Darning is a traditional sewing technique that involves using a needle and thread to weave over and under existing fabric threads to fill in holes and reinforce weaker areas. The word "darn" can be traced back to the Middle English word "derne," which means hidden or secret, and later the verb "darnen," which meant to mend.