Usage patterns
〈事〉をなおざりにするto neglect something
He was so busy with work that he neglected his health.
〈事〉がなおざりになるfor something to end up neglected
Even before exams, cleaning the room tends to get neglected.
〈事〉がなおざりにされるfor something to be left neglected (by someone)
In meetings, environmental issues tend to be brushed aside.
なおざりな態度a careless, neglectful attitude
His boss criticized him for his careless attitude.