Strong's G172 — ἄκακος (adjective)
akakos (ak'-ak-os) adj.
1. not bad
2. (objectively) innocent
3. (subjectively) unsuspecting
[from G1 (as a negative particle) and G2556]
KJV: harmless, simple 
Root(s): G1, G2556 
Hebrew root: κακός
Occurrences: 2