A knife (plural knives from Old Norse knifr 'knife, dirk') is a tool or weapon with a cutting edge or blade, often attached to a handle or hilt.One of the earliest tools used by humanity, knives appeared at least 2.5 million years ago, as evidenced by the Oldowan tools. Originally made of wood, bone, and stone (such as flint and obsidian), over the centuries, in step with improvements in both ...
Get Price