neglector

transitive verb

1. to ignore or disregard: to neglect the advice of others
2. to fail to care for or attend to sufficiently or properly; slight: to neglect one's family
3. to fail to carry out (an expected or required action) through carelessness or by intention; leave undone

noun

1. the action of neglecting
2. lack of sufficient or proper care; negligence; disregard
3. the state of being neglected