Negligent

Part of speech: adjective (a.)

Apt to neglect; customarily neglectful; characterized by negligence; careless; heedless; culpably careless; showing lack of attention; as, disposed in negligent order. "Be thou negligent of fame." Swift. He that thinks he can afford to be negligent is not far from being poor. Rambler.

Synonyms: Careles; heedless; neglectful; regardless; thoughtless; indifferent; inattentive; remiss.