The term 'WOOD PROBLEM' refers to two different issues that can affect wood: ROT and dryrot. ROT is a type of decay caused by fungi, which can cause wood to become soft and weak. Dryrot is a more serious form of decay caused by a fungus that can cause wood to become brittle and break apart. Both ROT and dryrot can be prevented by proper maintenance and care of wood, such as sealing it with a protective coating and keeping it away from moisture.