lunacy
word
Definition
Lunacy means extreme foolishness or crazy behavior; originally, it also referred to severe mental illness, but now it's mostly used to describe actions that seem wildly unreasonable or senseless.
Usage & Nuances
Often used in informal or dramatic speech to criticize extreme choices. Primarily means foolishness, not actual mental illness (avoid using it about real people with mental health issues). Common phrases: 'it would be lunacy to...', 'sheer lunacy', 'the lunacy of...'.
Example Sentences
The plan was rejected because of its apparent lunacy.
basic
It's sheer lunacy to drive this fast in the snow.
natural
Jumping into that river in winter is pure lunacy.
basic
The whole idea sounded like lunacy to me, but it somehow worked.
natural
Many thought her decision to quit her job was lunacy.
basic
There's a certain lunacy in trying the impossible just for fun.
natural