Dereliction

The act of leaving with an intention not to reclaim or resume; an utter forsaking abandonment.

A neglect or omission as if by willful abandonment.

The state of being left or abandoned.

A retiring of the sea, occasioning a change of high-water mark, whereby land is gained.

willful negligence

a tendency to be negligent and uncaring; "he inherited his delinquency from his father"; "his derelictions were not really intended as crimes"; "his adolescent protest consisted of willful neglect of all his responsibilities"