ἄκακος G172
ákakos · ak'-ak-os · Adjective
from Α (as a negative particle) and κακός; not bad, i.e. (objectively) innocent or (subjectively) unsuspecting:--harmless, simple.
2 Occurrences in the King James Bible
Romans 16:18For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple.
Hebrews 7:26For such an high priest became us, who is holy, harmless, undefiled, separate from sinners, and made higher than the heavens;