Strong's G338 — ἀναίτιος (adjective)
anaitios (an-ai'-tee-os) adj.
1. innocent
[from G1 (as a negative particle) and G159 (in the sense of G156)]
KJV: blameless, guiltless 
Root(s): G1, G159 
See also: G156 
Hebrew root: αἴτιος
Occurrences: 2