Related Clues:

• Sharp border
• Sword side
• Sharp side of a knife
• Jittery people are on it
• Blade's sharp side
• Added boost
• Show indecision
• Trim a lawn
• Cutting ___ (most advanced)
• Dither indecisively
• Move little by little to the border
• Brink of border
• Brink or border
• Sharpened side of blade
• Boundary of a surface