Strong's G4190 — πονηρός (adjective)
poneros (pon-ay-ros') adj.
1. hurtful, i.e. evil
2. (figuratively) calamitous
3. (passively) ill, i.e. diseased
4. (especially, morally) culpable, i.e. derelict, vicious, atrociously wicked
5. (neuter, singular) mischief, malice
6. (neuter plural) guilt
7. (masculine, singular) the devil
8. (plural) sinners
{(properly) in effect or influence, and thus differing from G2556, which refers rather to essential character, as well as from G4550, which indicates degeneracy from original virtue}
[from a derivative of G4192]
KJV: bad, evil, grievous, harm, lewd, malicious, wicked(-ness) 
Root(s): G4192 
Compare: G2556, G4550 
See also: G4191 
Hebrew root: πόνος
Occurrences: 77