Use negligent when you want to describe someone who just doesn't give a hoot. You can be negligent at work if you let the work pile up while you play computer games, or you can be negligent at home if you haven't fed your fish for six days straight.

The adjective negligent comes from the Latin word neglegentia, meaning "carelessness." Other words that share the same roots include the noun negligence and neglect — which has both noun and verb forms. All three words have meanings that imply the same sort of thing — a lack of attention to the well being of something or someone.

Definitions of negligent

adj characterized by neglect and undue lack of concern

negligent parents”
negligent of detail”
negligent in his correspondence”
showing a lack of attention or care
marked by lack of attention or consideration or forethought or thoroughness; not careful
delinquent, derelict, neglectful, remiss
failing in what duty requires
lax, slack
lacking in rigor or strictness
involving a driver of a motor vehicle who leaves the scene of an accident
inattentive, neglectful
not showing due care or attention
characterized by care and perseverance in carrying out tasks
actively or fully engaged or occupied
exercising caution or showing care or attention
assiduous, sedulous
marked by care and persistent effort
hardworking, industrious, tireless, untiring
characterized by hard work and perseverance
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