wretch  
noun [ C ] uk/retʃ/ us/retʃ/
  (UNHAPPY PERSON)      
  可怜的人;不幸的人
a person who experiences something unpleasant
  a poor/miserable wretch 可怜的/悲惨的人 
   (BAD PERSON)      
 informal or humorous讨厌的人;无耻之徒;恶棍 
someone who is unpleasant or annoying
  Who trampled on my flowers? I bet it was those two little wretches who live next door. 谁踩了我的花?我敢肯定是住在隔壁的那两个小坏蛋。 
 You wretch! You promised you'd give me a lift. 你真讨厌!你答应过让我搭车的。