Which term can be used to describe something that could be easily damaged?

The term "fragile" perfectly describes something that can be easily damaged. It refers to objects or materials that lack durability and can break, shatter, or become impaired with minimal force or impact. This term is commonly applied in various contexts, such as packaging, art, and materials, to indicate their delicate nature and the need for careful handling.

In contrast, other terms listed do not convey the same meaning. "Foolproof" suggests that something is designed to be safe or effective under all circumstances, thus not easily broken. "Forfeit" relates to the act of losing or giving up a right or privilege, which does not pertain to damage. "Forgery" refers to the act of falsifying documents or signatures, again unrelated to the concept of vulnerability or delicacy. Therefore, "fragile" stands out as the correct term to indicate something that is easily damaged.