derelict (adj) - abandoned or in bad condition from disuse and neglect; negligent or careless of duty
BREAKDOWN: DE- (from) + LIQ- (to abandon)
a derelict is someone without home or property
dereliction of duty is an intentional or accidental failure to meet legal or professional obligations
“Nothing in this world can take the place of persistence. Talent will not: nothing is more common than unsuccessful men with talent. Genius will not; unrewarded genius is almost a proverb. Education will not: the world is full of educated derelicts. Persistence and determination alone are omnipotent.” —Calvin Coolidge