plural imbecilities
Definition of imbecility
1a
: the quality or state of being very stupid or foolish : utter foolishness
… it seemed a very odd business, filled with illusions and delusions, at times noble to the point of imbecility and at other times base to the point of amorality.— Colleen McCullough
also
: futility
b
: something that is foolish or nonsensical
… his satire on the imbecilities and greed of politicians …— Nicholas Von Hoffman
2
dated, now offensive, see usage paragraph below
: the condition of being affected with moderate intellectual disability
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Merriam-Webster unabridged
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Time Traveler for imbecility
The first known use of imbecility was in 1624
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