insanity

insanity
noun
  1. [mass noun]the state of being seriously mentally ill; madness
    精神错乱,精神病;疯狂
    he suffered from bouts of insanity.
    他患了阵发性精神病。
    [as complement]he attempted to plead insanity.
    他试图以精神不正常作为辩护理由。
    ■extreme foolishness or irrationality
    极其愚蠢;极不合理
    it might be pure insanity to take this loan.
    接受这笔贷款可能是不折不扣的愚蠢行为。
    [count noun]the insanities of our time.
    当今的荒唐事。
语源
  1. late 16th cent.: from Latin insanitas, from insanus (see insane)
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