neglect

verb

1. (transitive)To fail to care for or attend to something.

   “to neglect duty or business;  to neglect to pay debts”

   “I hope My absence doth neglect no great designs.”

   “This, my long sufferance and my day of grace, Those who neglect and scorn, shall never taste.”

   “One of the hidden glories of Victorian engineering is proper drains.[…]But out of sight is out of mind. And that, together with the inherent yuckiness of the subject, means that many old sewers have been neglected and are in dire need of repair.”

2. (transitive)To omit to notice; to forbear to treat with attention or respect; to slight.

   “to neglect strangers”

3. (transitive)To fail to do or carry out something due to oversight or carelessness.

   “A friend of mine who runs an intellectual magazine was grousing about his movie critic, complaining that though the fellow had liked The Godfather (page 58), he had neglected to label it clearly as a masterpiece.”

4. (transitive)To ignore for the sake of simplifying calculations without significantly affecting accuracy.

   “We can neglect this term, as it approaches zero in the limit anyway.”

   “This problem says to neglect air resistance.”

noun

1. (countable, uncountable)The act of neglecting.
2. (countable, uncountable)The state of being neglected.
3. (countable, uncountable)Habitual lack of care.

   “Fifteen participants argued that the neglect of discourse on relationships had major implications for the ability of adolescents to acquire courtship skills and maintain relationships. This neglect means that the students acquire knowledge and skills through the media and by observing and imitating others in their immediate environment.”