Related Clues:

• Taper
• Subject to ablation
• Lose underpinnings, e.g.
• Do poorly in the stretch
• Slowly lose ground
• Go dim
• Lighten up
• Gradually destroy, as confidence
• Lessen gradually
• Wash away, as soil
• Diminish gradually
• Become weatherworn
• Dim
• Diminish, in a way
• Wither