Careless, heedless, negligent.

Careless in executing a task, duty, etc.; inattentive, lacking in diligence. Now rare.

Probably: careless, negligent.

Culpably negligent or remiss. Obsolete.

Of persons: inattentive to duty; not attending to, or doing, what ought to be done; neglectful. Also (now rare) with in, of.

Negligent, remiss; dilatory.

Negligent, remiss.

Heedless, neglectful. Const. of or infinitive.

Negligent. Chiefly in predicative use. rare.

= reckless, adj.

Of persons: Negligent, careless. Obsolete.

Lax, careless.