Related Clues:

• Is droopy
• Drops over time
• Loses strength
• Dips
• Is swaybacked
• Drops down
• Submits to gravity
• Doesn't look at all youthful
• Is no longer one of the firm?
• Looks sway-backed
• Loses intensity
• Doesn't hold up well, in a way
• Declines in value
• Loses resilience
• What an overloaded bookshelf does