re ‧ miss /rɪˈmɪs/ BrE AmE adjective [not before noun] formal
[ Date: 1400-1500 ; Language: Latin ; Origin: past participle of remittere 'to send back, relax' ]
careless because you did not do something that you ought to have done SYN negligent
remiss in
parents who are remiss in their duties
it was remiss of somebody to do something
It was remiss of the social services not to notify the police.