the.com/psychopath

means A person with a personality disorder marked by a persistent lack of empathy or remorse, shallow emotions, and often manipulative, impulsive, or antisocial behavior masked by superficial charm.

from Built from Greek psyche (soul, mind) and pathos (suffering), the word entered medical language in the 19th century as 'psychopathic' to describe a diseased or suffering mind — originally a broad catch-all for mental illness. Through the early 20th century it narrowed sharply, pulled toward describing a specific pattern of callousness and manipulation without guilt, especially through the work of psychiatrists cataloguing personality disorders. The clinical term has since been largely formalized as 'antisocial personality disorder,' with 'psychopath' itself living on more in popular and forensic use than in strict diagnostic manuals.