lunatic
/luːˈnætɪk/ adjective C2- Crazed, mad, insane, demented.
From the library
“I say, Watson,” he whispered, “would you be afraid to sleep in the same room with a lunatic, a man with softening of the brain, an idiot whose mind has lost its grip?”
As for Cordelia, she went insane with remorse and was shut up in a lunatic asylum.
It is not illegal, however, to keep a lunatic upon private premises so long as there is a qualified person in attendance and that the authorities have been duly notified.
He told the nurse that she was dreaming, that her suspicions were those of a lunatic, and that such libels upon her mistress were not to be tolerated.
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