Possible Clues:

• Cut sharp notches into
• Cut notches in
• Jagged edges of scythe are, we hear, doubly corroded
• Jag nearly placed to overtake Rolls-Royce
• Toothed along the edge
• Put grooves in
• Make a saw-toothed edge
• Like a bandsaw blade
• Make notches in
• Make a jagged edge