The term EDIBLE SUBTERRANEAN FUNGUS can be summarized as a TRUFFLE, which is a seven-letter word. Truffles are a type of edible fungus that grows underground and is highly sought after for its unique flavor and aroma. They are typically found in the roots of certain trees and are harvested by specially trained pigs or dogs. Truffles are a delicacy and are used in many dishes, from pasta to desserts.