Strong's G361 — ἀναμάρτητος (adjective)
anamartetos (an-am-ar'-tay-tos) adj.
1. sinless
[from G1 (as a negative particle) and a presumed derivative of G264]
KJV: that is without sin 
Root(s): G1, G264 
Hebrew root: ἁμαρτάνω
Occurrences: 1