What term refers to something that is abandoned or neglected?

The term "derelict" specifically refers to something that has been abandoned or neglected. In the context of property or items, it often describes buildings, vehicles, or other possessions that have fallen into disrepair because their owners have ceased to take care of them. This word captures the essence of neglect and abandonment, making it the most appropriate choice for the definition provided in the question.

The other terms take on different meanings: "destination" refers to a place where someone is going or to which something is sent; "diligent" describes someone who is careful and persistent in their work or efforts; and "discreet" refers to being careful or restrained in one's speech or actions, often to avoid causing offense or gaining attention. These alternative meanings clearly differentiate them from the specific concept of neglect associated with "derelict."