negligent
1. [ adjective ] characterized by neglect and undue lack of concern
Examples:

"negligent parents" "negligent of detail" "negligent in his correspondence"

Related terms: diligent lax hit-and-run derelict inattentive careless inattentive
2. [ adjective ] marked by insufficient care or attention
Examples:

"a negligent housekeeper" "negligent about personal cleanliness"

Related terms: careless
Similar spelling:   negligently
  neglige
  negligee
  negligence
  negligible
  necklike