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be a sadist
sadist 为可数名词，指以施加痛苦为乐的人；这里作表语。
He is a sadist.
他是个虐待狂者。
虐待狂者；施虐狂
sadists — plural of sadist
先理解核心含义，再看它在真实句子里的用法。
虐待狂者；施虐狂
a person who enjoys inflicting pain on others
He is a sadist.
他是个虐待狂者。
以残忍或他人痛苦为乐的人。
One who derives pleasure through cruelty or pain to others.
从施加痛苦中获得快感的人
someone who obtains pleasure from inflicting pain or others
The villain in the movie is a sadist who enjoys seeing his enemies suffer.
电影里的反派是个虐待狂，他喜欢看到敌人受苦。
She called her boss a sadist after he made the whole team work through the weekend.
她称老板是虐待狂，因为他让整个团队周末加班。
Only a sadist would take pleasure in watching someone trip and fall.
只有虐待狂才会以看到别人绊倒为乐。
sadist 为可数名词，指以施加痛苦为乐的人；这里作表语。
He is a sadist.
他是个虐待狂者。
call 后接宾语和名词作宾语补足语，表示“称某人为……”。
They called the general a sadist.
他们称那位将军为虐待狂者。
Not this
He is sadist.
Use this
He is a sadist.
sadist 是可数名词，指‘虐待狂者’，单数形式作表语时前面必须有冠词 a/an。中文没有冠词，所以学习者容易漏掉；加上 a 才符合英语可数名词单数的规则。
Not this
The movie was very sadist.
Use this
The movie was very sadistic.
sadist 是名词，不能作表语形容词；very 也不能修饰名词。表示‘很残忍的、施虐性的’应使用形容词 sadistic。
Not this
He is a sadism.
Use this
He is a sadist.
sadism 是不可数名词，指‘施虐癖／虐待狂’这种心态或行为，不能加 a 也不能指人；表示‘虐待狂者’要用可数名词 sadist。中文‘虐待狂’既可指人也可指状态，容易误用 sadism 指人。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
性施虐狂者
The police identified him as a sexual sadist.
警方认定他是一名性施虐狂者。
骨子里的虐待狂；本性施虐的人
He seems gentle, but he is a sadist at heart.
他看起来很温和，但骨子里是个虐待狂。
施虐狂与受虐狂
The novel explores the relationship between a sadist and a masochist.
这部小说探讨了一个施虐狂与一个受虐狂之间的关系。
自称的虐待狂者
In his memoir, he described himself as a self-confessed sadist.
他在回忆录中称自己为自认的虐待狂者。
虐待狂就是对受虐狂好的人。
This old joke defines a sadist as someone who is kind to a masochist.
这个老笑话把虐待狂定义为对受虐狂好的人。
受虐狂说：‘打我。’虐待狂说：‘不。’
This joke about the sadist and the masochist is still widely shared online.
这个关于虐待狂和受虐狂的笑话至今仍在网上广泛流传。
Use sadists naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想发音‘say-dust’：施虐狂把人打倒，冷冷说‘you are dust（你是尘土）’，从中取乐。
语域：neutral 常见场景：心理学或医学文本、法律与犯罪语境、日常对话（贬义） 该词为中性词，正式与口语场合均可用；常出现在心理学、法律等书面语境，口语中多含贬义。
没有常见单词与 sadist 的读音 /ˈseɪdəst/ 押韵。下列 -ist 结尾的词拼写相似，但末尾读 /ɪst/，与 sadist 的 /əst/ 不同，注意不要看拼写推测读音。
Dictionary facts from ECDICT, WIKTIONARY.