sadist

noun

1. 施虐狂者；（尤指）性施虐狂者
   a person who gets pleasure, especially sexual pleasure, from hurting other people

1. N-UNCOUNT 施虐癖;施虐欲
   Sadism is a type of behaviour in which a person obtains pleasure from hurting other people and making them suffer physically or mentally.
   1. Psychoanalysts tend to regard both sadism and masochism as arising from childhood deprivation.
      精神分析学家往往认为施虐狂和受虐狂都是由于儿时缺乏关爱造成的。

1. But the man is no sadist.
   但是他可不是施虐狂。
2. A sadist's on the loose, some think he's a mystical recluse.
   一个施虐狂逃跑了，有人认为他是一个神秘教的隐士。

noun

1. someone who obtains pleasure from inflicting pain or others