malefactor       
noun [ C ]  formal uk/ˈmæl.ɪ.fæk.tər/ us/ˈmæl.ə.fæk.tɚ/
 作恶者,坏人;罪犯
a person who does bad or illegal things
 Synonyms: criminal crook (CRIMINAL) culpritevildoerfelon the guilty partyoffenderoutlaw perpetratorvillain wrongdoer 
 
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