neglect

This word carries a heavy weight of responsibility and failure. It describes a gap between what is required and what is actually provided, often implying a moral or legal lapse. While forgetting something is accidental, neglect suggests a persistent or systemic lack of attention that leads to deterioration. In legal or social contexts, it takes on a clinical, accusatory tone, as in child neglect or professional negligence. It differs from simple indifference because it focuses on the negative consequences resulting from the absence of necessary care.