Related Clues:

• Get dimmer
• Develop ruts, say
• Destroy steadily
• Gradually lose color
• Slowly disappear
• Gradually destroy
• Siphon off, as support
• Tire near the finish
• Deteriorate slowly
• Undermine, as confidence
• Reduce bit by bit
• Wear away, as a beach
• Lose color, as jeans
• Become eaten away
• Get lighter, as jeans