dément
insane, demented
adjective deh-MAHN Rare
Origin: Latin demens (out of one's mind)
Also means
crazy (colloquial intensifier)
Usage Note
Dément has a clinical sense ('suffering from dementia', un patient dément) and a strong colloquial sense meaning 'absolutely insane' or 'mind-blowing' (C'est dément! — 'That's crazy!'). The feminine is démente, and the noun démence refers to the medical condition. In the colloquial sense it is an enthusiastic intensifier with no negative connotation.
Examples
"Ce spectacle était complètement dément."
Natural Translation
That show was completely mind-blowing.

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