noun, plural im·be·cil·i·ties.
Examples from the Web for imbecility
Condescension can be irritating in its expression of hysteria and imbecility, but that comes with freedom of speech.
Consternation ruled supreme, treason and imbecility were everywhere charged against the authorities.The Life of Napoleon Bonaparte|William Milligan Sloane
For two years more he lingered, sinking slowly into unconsciousness and imbecility.Queen Victoria|Lytton Strachey
He moved away reluctantly, and again she almost laughed at his imbecility.The Swindler and Other Stories|Ethel M. Dell