Related Clues:

• Deteriorates and then some
• Is no longer good
• Becomes inedible, maybe
• Falls into decay
• Spoils badly
• Turns rancid
• Wastes away
• What acoustic's wood does, perhaps
• Starts to smell
• Molders to nothing
• Languishes in prison
• Biodegrades, say
• Becomes spongy, as wood
• Turns colors, maybe
• Falls prey to decay