## Meanings
1. A person with extreme, often unreasonable enthusiasm for a cause or belief.
2. A person who is extremely keen on a hobby or interest.
3. Marked by extreme, intense devotion to a cause or idea.

## Examples
- The group was led by a religious fanatic with dangerous ideas.
- My brother is a complete football fanatic.
- He had a fanatic devotion to his political party.

## Derived Forms
- fanaticize
- nonfanatic
- ultrafanatic
- unfanatic

## Roots and Affixes
- Root: fānāticus

## Etymology
First attested in 1525. Learned borrowing from Latin fānāticus (“of a temple, divinely inspired, frenzied”), from fānum (“temple”). Influenced by French fanatique.

## AI Etymology
Fanatic is first attested in 1525. Learned borrowing from Latin fānāticus (“of a temple, divinely inspired, frenzied”), from fānum (“temple”). Influenced by French fanatique. In present-day use, it can mean a person with extreme, often unreasonable enthusiasm for a cause or belief, or a person who is extremely keen on a hobby or interest. Derived formations include fanaticize, nonfanatic, ultrafanatic, and unfanatic.

## Topics
- Abstract Ideas
- Word Formation & Derivatives

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