What does k stand for?

Knife

A knife is a cutting tool with a cutting edge or blade, hand-held or otherwise, with or without a handle. Knife-like tools were used at least two-and-a-half million years ago, as 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 Originally made of rock, bone, flint, and obsidian, knives have evolved in construction as technology has, with blades being made from bronze, copper, iron, steel, ceramics,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.

Key/Black

Kinda

Keepin

Puzzlement

Kat

Kenshin

Kenneth

Kenna

Kelly

A long hollo w, square section forging which screws into the top section of a drill pipe. It is driven by the rotary table and provides the drill pipe with both rotational movement and drilling mud.