名詞 malefactor:

1. someone who has committed (or been legally convicted of) a crime
   同義詞：criminal, felon, crook, outlaw

1. Malefactors will be pursued and punished.
   作惡的人要予以究治。

mal.e.fac.tor

n.（名詞）
One that has committed a crime; a criminal.
罪犯：犯了某種罪行的人；犯人
An evildoer.
壞人：做壞事行惡之人

來源：
Middle English malefactour
中古英語 malefactour
from Latin malefactor
源自 拉丁語 malefactor
from malefacere [to do wrong]
源自 malefacere [做壞事]
male [ill] * see mel- 3
male [壞的] *參見 mel- 3
facere [to do] * see dhô-
facere [做] *參見 dhô-

【引伸】
mal.efac.tion