laches /ˈlætʃɪz/ noun2 •Negligence in one's duty.But there was a quality in Mary that did not lightly invite to gallantry—a gravity and a balance that, had he looked closely into the matter, might have explained his laches. — 1919 •An unreasonable delay in bringing a claim alleging a wrong, which means the person who waited shall not be permitted to seek an equitable remedy because the delay prejudiced the moving party.It ill became him to take advantage of such a laches with the eagerness of a shrewd attorney. — 1849