Knife



A knife (plural knives) is a cutting tool with a cutting edge or blade, hand-held or otherwise, with or without a handle. Knife-like tools were used on Terra at least two-and-a-half million years ago, evidenced by the Oldowan tools. Originally made of rock, bone, flint, and obsidian, knives have evolved in construction as technology has, with blades being made from bronze, copper, iron, steel, ceramics, and titanium. Many cultures have their unique version of the knife. Due to its role as humankind's first tool, certain cultures have attached spiritual and religious significance to the knife.

Knives are used as weapons, in sports, utensils, tools and as a traditional or religious implement

The word knife possibly descends from an old Norse word knifr for blade.

Most modern-day knives follow either a fixed-blade or a folding construction style, with blade patterns and styles as varied as their makers and culture of origin.