demented

Past participle of dement, from Latin dēmentāre.

• IPA^(key): /dɪˈmɛntɪd/

• Audio (US)

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demented (comparative more demented, superlative most demented)

1. Insane; mentally ill.
   • 2012 August 5, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “I Love Lisa” (season 4, episode 15; originally aired 02/11/1993)”, in (Please provide the book title or journal name)‎:

     So while Ralph generally seems to inhabit a different, more glorious and joyful universe than everyone else here his yearning and heartbreak are eminently relateable. Ralph sometimes appears to be a magically demented sprite who has assumed the form of a boy, but he’s never been more poignantly, nakedly, movingly human than he is here.

2. Having dementia.
3. (informal) Crazy; ridiculous.
   • c. 1990, How to Play Super C (PDF) (instruction manual), Konami, page 4:

     One of these new recruits is Jagger Froid, a demented alien from the Black Hole Galaxy, who dishes out punishment with a laser-sharp tongue.

   a demented idea

• dementedness

demented

1. simple past and past participle of dement

• mentally ill