Strongs: G878
G878 @ 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: - fool (-ish) unwise.
Luke:11:40
Luke:12:20
Romans:2:20
1Corinthians:15:36
2Corinthians:11:16
2Corinthians:11:19
2Corinthians:12:6
2Corinthians:12:11
Ephesians:5:17
1Peter:2:15