Related Clues:

• Partly eat away
• Slowly reduce, as a cliff face
• Slip away, as support
• Gradually diminish
• Diminish slowly
• Shrink in increments
• Grind down
• Disappear, like a hairline
• Move back
• Chip away, as support
• Shrink slowly
• Eat off the land?
• Diminish naturally
• Wear down slowly
• Deplete gradually