King James Bible
King James Version (KJV)

From a (as a negative particle) and kakos; not bad, i.e. (objectively) innocent or (subjectively) unsuspecting -- harmless, simple.
see GREEK a
see GREEK kakos
a. without guile or fraud, harmless; free from guilt: Hebrews 7:26; (cf. Clement, fragment 8, Jacobson edition (Lightfoot S. Clement of Rome etc., p. 219): ἄκακος ὁ πατήρ πνεῦμα ἔδωκεν ἄκακον).
b. fearing no evil from others, distrusting no one, (cf. English guileless): Romans 16:18. ((Aeschylus) Plato, Demosthenes, Polybius, others; the Sept.) (Cf. Trench, § lvi.; Tittmann i., p. 27f.)