Select the most appropriate one-word substitution for the given group of words.

A person who enjoys inflicting pain on himself

Masochist

The most appropriate one-word substitution for "a person who enjoys inflicting pain on himself" is masochist.

• Sadist enjoys inflicting pain on others.
• Senile means showing the physical or mental signs of old age.
• Psychopath is a person with a personality disorder characterized by antisocial behavior, lack of empathy, and a disregard for the rights of others.

The word masochist comes from the name of Leopold von Sacher-Masoch, a 19th-century Austrian writer who described his own enjoyment of pain and humiliation. Masochism is a sexual disorder in which a person derives sexual pleasure from being subjected to physical pain or humiliation.