remiss       
adjective [ after verb ]  formal uk/rɪˈmɪs/ us/rɪˈmɪs/
 疏忽的;懈怠的;玩忽职守的
careless and not doing a duty well enough
  You have been remiss in your duties. 你一直玩忽职守。 
 [ + to infinitive ] It was remiss of me to forget to give you the message. 我忘了把口信转达给你,是我的疏忽。 
 Synonym: neglectful