Strong's G877 · Greek

ἀφροσύνη

aphrosune · af-ros-oo'-nay

from 878; senselessness, i.e. (euphemistically) egotism; (morally) recklessness

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 4 ἀφροσύνη , -ης, ἡ ( ἄφρων ), [in LXX for אִוֶּלֶת , נְבָלָה , etc.;] foolishness : Mk 7:22 , II Co 11:1 , 17 , 21 .† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain