"Fatuity" is a word in ENGLISH

binúang - Foolish, absurd, idiotic, imbecile, fatuous, drivelling, weak-minded, feeble-minded, soft, crazy, stupid, addlepated; after the manner of fools, like …

The state of being broken in mind; imbecility or weakness of intellect; derangement.

Insanity; madness; esp. that form which consists in weakness or total loss of thought and reason; mental imbecility; idiocy.

Foolish; weak; imbecile.

Weak in intellectual power; wanting firmness or constancy; irresolute; vacilating; imbecile.

The quality of being imbecile; weakness; feebleness, esp. of mind.

The quality or condition of being impotent; want of strength or power, animal, intellectual, or moral; weakness; feebleness; inability; imbecility.

One who is morally or mentally weak or inefficient; an imbecile; a simpleton.