• Becoming weaker
• Blowing away
• Crumbling away
• Disintegrating
• Eating away
• Gradually disappearing
• Like some coastlines
• Losing ground
• Rusting.
• Washing away
• Wearing away
• Wearing down
• The mechanical process of wearing or grinding something down (as by particles washing over it)
• Become ground down or deteriorate
• Remove soil or rock, as of wind or water