Why are conkers called conkers?

Conkers are called so because the name derives from the game traditionally played with the seeds of the horse chestnut tree, known as "conkers." The term is believed to come from the old English Word "conker," which referred to a hard nut or shell. The game involves stringing a conker and taking turns striking opponents' conkers until one breaks. This playful competition has made the name synonymous with the horse chestnut seeds used in it.