Strong's G877 — ἀφροσύνη (noun)
aphrosune (af-ros-oo'-nay) n.
1. senselessness
2. (euphemistically) egotism
3. (morally) recklessness
[from G878]
KJV: folly, foolishly(-ness) 
Root(s): G878 
Hebrew root: ἄφρων
Occurrences: 4