被信念佔住的人
最接近字源的用法：被佔住的是政治或宗教信念，所以旁人看到的是危險。
fanatic (extremist) · noun · C2
A person with very strong political or religious ideas who will not change them, and who other people often see as dangerous.
狂熱分子
核心畫面
One way to picture it: someone burning with one idea, so completely taken over by it that nothing else gets in.
一個人整顆心被一件事佔滿，燒得發燙，別的東西再也擠不進去。旁人跟他說話，話題轉三圈還是繞回那件事。這種「被一件事整個…更多收起
一個人整顆心被一件事佔滿，燒得發燙，別的東西再也擠不進去。旁人跟他說話，話題轉三圈還是繞回那件事。這種「被一件事整個佔據」的狀態，就是 fanatic 的底色——差別只在被佔據的是什麼：如果是政治或宗教信念，別人會覺得可怕；如果是球隊或電影，別人只覺得他很投入。From the word’s history
Latin fanaticus originally described someone 'of a temple, divinely inspired, frenzied' — from fanum, 'temple'. The picture is a person seized by something inside a holy place, not in control of themselves.
拉丁文 fanaticus 原本是「屬於神廟的、受神靈附身而癲狂的」，來自 fanum（神廟）。原始畫面是廟裡被神附身、行為失控的人——所以這個字從一開始講的就不是「很喜歡」，而是「被某種東西整個佔住、自己收不回來」。這也解釋了為什麼它到今天都還帶著一點失控的味道。
Wiktionary, 'fanatic' (etymology: Latin fānāticus, from fānum 'temple'; first attested 1525)
Two branches
被興趣佔住的人
同一種「被佔滿」的狀態，但對象換成無害的興趣，於是危險感褪掉，剩下投入的程度。
fanatic (enthusiast) · noun · C2
A person who likes one thing or activity so much that they give it a huge amount of time and energy.
迷
原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
fanaticadj/fəˈnæt.ɪk/
- 1
Fanatical.
- But Faith, fanatic Faith, once wedded fast / To some dear falsehood, hugs it to the last.
- 2
obsoleteShowing evidence of possession by a god or demon; frenzied, overzealous.
fanaticnoun/fəˈnæt.ɪk/
- 1
A person who is zealously enthusiastic for some cause.
- The reclusive tycoon calling himself the Illusive Man is a human nationalist focused on advancing human interests, whatever the cost to non-humans. The Citadel Council regards him as a fanatic posing a serious threat to galactic security.
- A zealot can't change his mind. A fanatic can't change his mind and won't change the subject. —Winston Churchill (attributed)
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。