כֶּסֶל keçel (H3689)

properly, fatness, i.e. by implication (literally) the loin (as the seat of the leaf fat) or (generally) the viscera; also (figuratively) silliness or (in a good sense) trust

1) loins, flank 2) stupidity, folly 3) confidence, hope

from כָּסַל (H3688);