Strong's #2554: kakopoieo (pronounced kak-op-oy-eh'-o)
 from 2555; to be a bad-doer, i.e. (objectively) to injure, or (genitive) to sin:--do(ing) evil.
Thayer's Greek Lexicon:
 ́ 
 
  kakopoieō 
 
 1) to do harm
 2) to do evil, do wrong
 
  Part of Speech: verb
Relation: from G2555
  Citing in TDNT: 3:485, 391
 
Usage:
This word is used 4 times:
Mark 3:4: "on the sabbath days, or  to do evil? to save life, or to kill?"
Luke 6:9: "sabbath days to do good, or  to do evil? to save life, or to destroy"
1 Peter 3:17: "so, that ye suffer for well doing, than  for evil doing."
3 John 1:11: "of God: but  he that doeth evil hath not seen God."