knife
Piece of silverware consisting of a handle and a sharp blade used to cut food into bite-sized pieces.
blade 
Thin flat piece of metal forming the sharp part of a knife.
cutting edge 
Tapered edge of the blade designed for cutting.
side 
Flat surface of the blade between the back and the cutting edge.
tang 
Part of the blade extending into the handle, by which it is attached.
tip 
Front, usually rounded, end of the blade.
back 
Blunt side of the blade.
bolster 
Protruding part that prevents the blade from touching the surface of the table when the knife is laid flat.
handle 
Part used to pick up and handle the knife.