fanatic

Compared meaning: having strong feeling or enthusiasm (adjective).

比较义项：强烈的情感或热情（形容词）。

• passionate

  A general, widely used word for strong enthusiasm or emotion; usually positive, describing speeches, beliefs, hobbies or a person's character, without implying excess.

  通用词，形容强烈的热情或情感，通常含褒义，可用于演讲、信念、爱好或性格，不含过度之意。

  He gave a passionate speech about protecting the environment.

  他就保护环境的问题发表了一场热情洋溢的演讲。

• fiery

  Emphasizes the heat and intensity of emotion, especially anger or temper; often used for a hot-tempered personality or a heated argument, not devotion to a cause.

  强调情绪的炽烈和强度，尤指愤怒或脾气，常用来形容火爆的性格或激烈的争论，而不是对某项事业的热忱。

  She has a fiery temper whenever someone criticizes her work.

  每当有人批评她的工作，她就会脾气火爆。

• fanatic 本词

  Implies extreme, excessive and often uncritical enthusiasm bordering on obsession; carries a mildly negative or joking tone rather than genuine admiration.

  暗指极端、过度且往往不加批判的热情，近乎痴迷，语气略带贬义或调侃，而非真正的钦佩。

  He's a total fanatic about collecting old vinyl records.

  他对收集老式黑胶唱片简直到了痴迷的地步。

• ardent

  A formal or literary word for zealous, devoted enthusiasm, especially toward a cause, belief or person; often paired with 'supporter', 'admirer' or 'believer'.

  较为正式或书面化的词，形容对某项事业、信念或人物的热忱与忠诚，常与“支持者”“仰慕者”或“信徒”搭配使用。

  He is an ardent supporter of local environmental projects.

  他是本地环保项目的热心支持者。

Passionate, ardent, fiery, and fanatic all mean strong feeling. Passionate and ardent are positive and formal. Fiery means a hot temper or heated argument. Fanatic means extreme, almost obsessive, often negative or joking. Fiery also means 'spicy'; fanatic can be a noun; not compared here.

这几个词都可以形容强烈的情感或热情，但语气和用法不同：passionate 和 ardent 语气偏正式、偏褒义；fiery 强调情绪的火爆，尤指脾气或场面激烈；fanatic 强调狂热到近乎盲目，含贬义或戏谑意味。这里不比较 fiery 表示“火红的、辛辣的”（如很辣的食物）以及 fanatic 作名词表示“狂热者”的用法。