narcissist

UK: ˈnɑː.sɪ.sɪst | US: ˈnɑːr.sɪ.sɪst

Definition
  1. n. A person who has an excessive interest in or admiration of themselves, often at the expense of others.

  2. n. (Psychology) A person with narcissistic personality disorder, characterized by grandiosity, lack of empathy, and a need for admiration.

Structure
narciss <self-love, from Greek *Narkissos*>ist <agent noun suffix, denoting a person>
Etymology

The word derives from the Greek myth of Narcissus, a youth who fell in love with his own reflection in a pool and wasted away, unable to leave it. The name Narcissus (Greek Narkissos) may be linked to narke (numbness, stupor), referencing the paralyzing effect of self-obsession. The suffix -ist (from Latin -ista, Greek -istes) denotes someone who practices or is characterized by a trait, here forming "narcissist" to describe extreme self-admiration.

Examples
  1. The CEO’s reputation as a narcissist made teamwork difficult.

  2. She realized her ex-partner was a narcissist only after years of emotional manipulation.

  3. Not all confident people are narcissists; the disorder involves deeper psychological patterns.

  4. The therapist specialized in treating narcissists struggling with empathy deficits.

  5. His social media posts revealed classic narcissist traits, like constant self-promotion.