Quench: To rapidly cool heated metal by immersing it in oil, water, or some other type of cooling substance in order to change the property of the metal.

Queen Cutlery:  An American Knife company manufacturing in Titusville, Pennsylvania famous for traditional pattern knives.. They are associated with Ontario Knife Company an dproduce several other knife brands.

Quillon: A guard protruding from both sides of knife that separates the handle for the blade and prevents the hand from making contact with cutting surface of the blade. Same as corssguard.