from an unused root (meaning to be perverse); TWOT - 44a
AV - fool(s) 20, foolish (man) 6; 26
1) be foolish, foolish
1a) (subst)
1a1) of one who despises wisdom
1a2) of one who mocks when guilty
1a3) of one who is quarrelsome
1a4) of one who is licentious