dereliction

Willful neglect of one's duty.

The new soldier did not clean his cabin and was scolded for dereliction and disobedience.

What he did was a terrible dereliction of duty.

The act of abandoning something, or the state of being abandoned.

To this we must contend with prayer , with actual dereliction and seposition of all our other affairs

There is much sad evidence, too, of the spoliation and dereliction of vanished industry: tips, slag-heaps and derelict colliery-screens among which the ubiquitous, nomad mountain sheep graze unconcernedly.

Land gained from the water by a change of water-line.