sociopath
Clinical or formal term for a person with antisocial personality disorder; less common in everyday conversation than ソシオパス.
Sociopaths are said to have difficulty empathizing with others' feelings.
More common loanword for 'sociopath' in everyday Japanese; 社会病質者 is a formal, clinical equivalent.
Compound of 社会 (society), 病質 (pathological disposition), and 者 (person). A direct translation of the English 'sociopath'.