Negligently adv. : In a negligent manner.

Example:
If a landlord Negligently allows a 3rd party to enter my rental and property is stolen, who do I sue?

Taxonomy
negligence, plaintiff, defendant, injury, duty, damages, reasonable person, law, failure, acted, driver, proximate cause, liability, court, statute, loss, jury, evidence.

Defination from the web:
negligence n. The state or quality of being negligent. A negligent act or a failure to act. Law . Failure to exercise the degree of care considered ... A person has acted negligently if she has departed from the conduct expected of a reasonably prudent person acting under similar circumstances. ...