imbecility

/ˌɪmbəˈsɪləti/
noun
  1. Extreme stupidity or foolishness.
    • The movie's plot relied on the imbecility of its characters to create conflict.
    • He shook his head at the imbecility of the decision to drive in the storm.
    • The plan was an act of pure imbecility that cost the company thousands.
  2. A stupid or foolish action, remark, or idea.
    • She apologized for her imbecility in forgetting the meeting time.
    • I've heard enough imbecilities for one day; let's talk about something sensible.
    • The politician's speech was full of imbecilities that made no sense.