insanity

Từ điển Oxford Advanced Learner 8th

in·san·ity [insanity insanities] BrE [ɪnˈsænəti] NAmE [ɪnˈsænəti] noun uncountable
1. the state of being ↑insane
Syn: ↑madness
•He was found not guilty, by reason of insanity.
Opp: ↑sanity
2. actions that are very stupid and possibly dangerous
Syn: ↑madness, Syn: ↑lunacy
•It would be sheer insanity to attempt the trip in such bad weather.

Word Origin:
late 16th cent.: from Latin insanitas, from insanus, from in- ‘not’ + sanus ‘healthy’.

Example Bank:
•Congress has one option to stop this insanity.
•Hamlet feigns insanity to disguise his bloody motive.
•He was found not guilty by reason of insanity.
•His lawyer got him off on an insanity plea.

• Từ trái nghĩa / Antonyms:
  sanity, saneness