Strong's G2555 — κακοποιός (adjective)
kakopoios (kak-op-oy-os') adj.
1. a bad-doer
2. (specially), a criminal
[from G2556 and G4160]
KJV: evil-doer, malefactor 
Root(s): G2556, G4160 
Hebrew root: ποιέω
Occurrences: 3