fool(-ish), unwise

Strong’s Dictionary of Greek Words:

Number:
878 (find all occurrences in KJV Bible)
Greek:
ἄφρων
Transliteration:
aphron
Phonic:
af’-rone
Meaning:
from 1 (as a negative particle) and 5424; properly, mindless, i.e. stupid, (by implication) ignorant, (specially) egotistic, (practically) rash, or (morally) unbelieving
KJV Usage:
fool(-ish), unwise