Strong's #3688: kacal (pronounced kaw-sal')

a primitive root; properly, to be fat, i.e. (figuratively) silly:--be foolish.

Brown-Driver-Briggs Hebrew Lexicon:

ּ

kâsal

1) (Qal) to be foolish, be stupid

Part of Speech: verb

Relation: a primitive root

Usage:

This word is used 1 times:

 

Jeremiah 10:8: "But they are altogether brutish and foolish: the stock is a doctrine of vanities."