Lack of attention to what ought to be done; failure to take proper or necessary care of a thing or person; lack of necessary or reasonable care in…

Slackness (of body or mind); remissness; also, cowardice.

Drowsiness as evidenced by yawning; dullness; indolence, negligence, inattention.

Lack of attention to what ought to be done; the fact of leaving something undone or unattended to; negligence. Also with of.

neglect.

The condition or fact of being drowsy, listless, inattentive, or negligent; an instance of inattention or negligence. Obsolete.

Failure to exercise due care or attention.

In extended use: culpable negligence. Now archaic and rare.