insanity
noun /ɪnˈsænəti/
  /ɪnˈsænəti/
- [uncountable] the state of being insane synonym madness- He was found not guilty, by reason of insanity.
 Extra Examples- Hamlet feigns insanity to disguise his bloody motive.
- His lawyer got him off on an insanity plea.
 Oxford Collocations Dictionaryadjective- total
- temporary
 - plead
- feign
- stop
- …
 - defence/defense
- plea
 - by reason of insanity
 
- [uncountable] (also insanities [plural])actions that are very stupid and possibly dangerous synonym madness, lunacy- It would be sheer insanity to attempt the trip in such bad weather.
- Congress has one option to stop this insanity.
- But the show does capture the various insanities and absurdities of his life.
 
Word Originlate 16th cent.: from Latin insanitas, from insanus, from in- ‘not’ + sanus ‘healthy’.