demented

/di'mentid/
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demented

A man with a demented expression stares blankly at a wall.

Definition

Adjective: 1. Suffering from dementia; insane; mad: Describes a person whose mental faculties are severely impaired, often due to illness or extreme emotion, resulting in irrational or wildly foolish behavior. 2. Wildly foolish or irrational: Can describe actions, ideas, or states that are so illogical or absurd as to seem insane.

Usage
  • Used to describe a person's state of mind, typically implying a severe and often distressing loss of rationality.
  • Can be used informally and hyperbolically to describe extreme foolishness or chaos, not necessarily clinical insanity.
  • Often carries a stronger, more dramatic connotation than words like "crazy" or "foolish."
Examples
  • Adjective:
    • The demented patient required constant care. (Describes a person with a medical condition).
    • He was demented with grief after the loss. (Describes a temporary state of extreme, irrational emotion).
    • Their plan to build a house of cards in a windstorm was utterly demented. (Describes a wildly foolish idea).
Advanced Usage
  • "To drive someone demented": To irritate, annoy, or frustrate someone to an extreme degree.
    • The constant noise from the construction site is driving me demented.
Variants and Related Words
  • Dementia (n): The medical condition of chronic or persistent disorder of mental processes, marked by memory disorders, personality changes, and impaired reasoning.
    • The doctor diagnosed the patient with advanced dementia.
  • Dement (v, archaic): To make insane or to drive mad. (Rarely used in modern English).
    • The horrific sights were enough to dement a person.
Synonyms
  • Insane: Of unsound mind; clinically mad.
  • Mad: Mentally ill; insane. (Also used informally for anger or excitement).
  • Deranged: Disturbed the orderly arrangement of; unsettled the mind of.
  • Unhinged: Mentally unbalanced; disturbed.
  • Lunatic: (Informal, potentially offensive) Wildly foolish or insane.
Antonyms
  • Sane: Of sound mind; not mad or mentally ill.
  • Rational: Based on or in accordance with reason or logic.
  • Lucid: Expressed clearly; easy to understand. (Also: able to think clearly, especially in intervals between periods of confusion).
Related Idioms
  • (As) mad as a hatter: Completely insane. (This idiom is closely related in meaning to "demented" in its informal sense).
    • He was running around shouting at pigeons—he was as mad as a hatter.
demented

A man with a demented expression stares blankly at a wall.

Adjective
  1. affected with madness or insanity
    • a man who had gone mad

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