Related Clues:

• Fall off, as popularity
• Disappear gradually
• Many hairlines do it
• Withdraw
• Subject to ablation
• Lose underpinnings, e.g.
• Slowly lose ground
• Pull back
• Gradually destroy, as confidence
• Lessen gradually
• Wash away, as soil
• Diminish gradually
• Become weatherworn
• Diminish, in a way
• Some shorelines do it