Remiss is an adjective that means neglectful of duty.

The Latin word remissus (ray MEESE ooose) means ‘slack’ or ‘careless.’ Our word of the day has retained this meaning. A remiss worker is one who is careless.

Here’s an example: The suspect, Mr. Weiss was able to slip inside because the security guard was remiss in his duties. Had the guard been wide awake, it would have been impossible for Mr. Weiss and his eight friends to walk right past him.