demented

Past participle of dement +‎ -ed, from Latin dēmentāre.

• IPA^(key): /dɪˈmɛntɪd/

• Audio (US):

  (file)

demented (comparative more demented, superlative most demented)

2. 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 AV Club‎^[1], archived from the original on 28 December 2012:

     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.

4. Having dementia.
6. (informal) Crazy; ridiculous.

   a demented idea

   • 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.

   • 2025 June 3, Mark O’Connell, “‘The Mozart of the attention economy’: why MrBeast is the world’s biggest YouTube star”, in The Guardian‎^[2], archived from the original on 7 June 2025:

     Literally nothing happens, apart from Donaldson counting to 100,000. In this sense, it is nothing like his later videos, defined as they are by a near-demented commitment to maximum viewer-stimulation.

demented

1. simple past and past participle of dement

• mentally ill