derelict
/ˈdɛɹəlɪkt/noun
A piece of property that its owner has given up, especially a ship left behind at sea.
Example sentence
- “The divers explored a derelict rusting on the ocean floor.”
As an adjective it describes abandoned buildings, and 'derelict in one's duty' means failing to do it. The noun can also mean a homeless person, which reads as harsh.