negligent
UK: /ˈneɡlɪdʒənt/ | US: /ˈneɡlɪdʒənt/
adj. failing to take proper care; careless or indifferent
adj. (Law) failing to exercise the standard of care expected, resulting in harm or damage
The word "negligent" traces back to Latin neglegere ("to disregard, not pick up"), combining neg- (not) + legere (to choose). Over time, legere expanded to mean "to pay attention" (as in "select with care"), giving "negligent" its modern sense of "failing to care." The legal usage emerged from the idea of omitting due diligence.
The negligent driver caused an accident by texting while driving.
Landlords can be sued for negligent maintenance of rental properties.
Her negligent attitude toward deadlines cost the team the project.
The court ruled the doctor was negligent in his duties.
Negligent handling of sensitive data led to a major security breach.