psychopath

/ˈsaɪkoʊˌpæθ/

Etymology

From German psychopathisch, from Ancient Greek ψυχή (psukhḗ, “soul”) + πάθος (páthos, “suffering”).

Why this word is great

PSYCHOPATH — [Noun] A person with a personality disorder characterized by persistent antisocial behavior, impaired empathy and remorse, and bold, disinhibited, and egotistical traits. From German psychopathisch, rooted in the Greek psukhḗ ("soul") and páthos ("suffering")—a haunting irony, given their inability to feel either. Unlike a "sociopath" (whose violence is often reactive, shaped by environment) or a "narcissist" (who craves validation, however hollow), the psychopath moves through the world like a shark: sleek, efficient, untroubled by conscience. It is the CEO who ruins lives without a second thought, the charming stranger whose smile never reaches their eyes, or the predator who studies human weakness like a mathematician solving for X—a chilling reminder that some souls are not fractured, but simply absent.

noun

A person with a personality disorder indicated by a pattern of lying, cunning, manipulating, glibness, exploiting, heedlessness, arrogance, delusions of grandeur, carelessness, low self-control, disregard for morality, lack of acceptance of responsibility, callousness, and lack of empathy and remorse. Such a person may be especially prone to violent and criminal offenses.
A person with no moral conscience.“Now the real difference between now and then was that Trump wasn't looking to do much of anything positive for the American people as a whole. He mainly enriched himself and his family and gave rich people another tax cut. I think as far as Republicans being psychopaths I would say yes but it's probably a bit more complicated. The party is struggling to message against the policies the Biden admin”
A person who perpetrates especially gruesome or bizarre violent acts.
A person diagnosed with antisocial or dissocial personality disorder.
A person diagnosed with any mental disorder.