madness

noun
1
the state of having a serious mental illness
دیوانگی, جنون, اختلال روانی, آشفتگی روانی
synonym insanity
2
crazy or stupid behaviour that could be dangerous
دیوانگی, جنون, حماقت, دیوانه‌بازی
It would be sheer madness to trust a man like that.
In a moment of madness she had agreed to go out with him.
The real victim in this collective madness is our society.
see also March Madness™