insanity
noun
in·san·i·ty
in-ˈsa-nə-tē
plural insanities
1
dated
: a severely disordered state of the mind usually occurring as a specific disorder
2
law
: unsoundness of mind or lack of the ability to understand that prevents someone from having the mental capacity required by law to enter into a particular relationship, status, or transaction or that releases someone from criminal or civil responsibility
3
a
: extreme folly or unreasonableness
the insanity of violence
His comments were pure insanity.
b
: something utterly foolish or unreasonable
the insanities of modern life
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Merriam-Webster unabridged
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