aloofness — the quality or state of being aloof, distant, or reserved; indifference: His girlfriend's recent aloofness may be a sign that the relationship is over.
disregard — to pay no attention to; leave out of consideration; ignore: Disregard the footnotes.
ignorance — the state or fact of being ignorant; lack of knowledge, learning, information, etc.
neglect — to pay no attention or too little attention to; disregard or slight: The public neglected his genius for many years.
