If someone is guilty of negligence, they have failed to do something which they ought to do.
carelessness , failure , dereliction , omission , oversight
The soldiers were ordered to appear before a disciplinary council on charges of negligence.
士兵们被控玩忽职守,被要求接受纪律委员会的审查。
He now stands accused of treating classified secrets with gross negligence.
他现在面临在处理机密上存在严重疏忽的指控。