The state of being negligent.
The breach of a duty of care: the failure to exercise a standard of care that a reasonable person would have in a similar situation.
The tort whereby a duty of reasonable care was breached, causing damage: any conduct short of intentional or reckless action that falls below the legal standard for preventing unreasonable injury.
Maintenance; the act or effort of keeping something in good and working condition.
Do you know how to upkeep a boat?
To maintain (something) or keep it in good repair.