Related Clues:
- Crumble away, as shoreline
- Ruin the topsoil
- Inch back slowly, as a hairline
- Diminish, as support in a poll
- Fall off, as confidence
- Break down gradually
- Withdraw (as one's hairline does)
- Decline, as floodwaters
- Grind away before sealing arrangement with bank
- Slowly break off?
- Slowly break down
- Reduce by degrees
- Reduce over time
- Weaken, as support
- Deteriorate over time