ἄφρων
aphrōn
af'-rone
From G1 (as a negative particle) and G5424; properly mindless, that is, stupid, (by implication) ignorant, (specifically) egotistic, (practically) rash, or (morally) unbelieving
KJV Usage: fool (-ish), unwise.
KJV Usage: fool (-ish), unwise.