What is the Greek word for geek?

There isn't a single, perfect Greek word translation for "geek." The best choice depends on the nuance you want to convey. Here are a few options with slightly different connotations:

* Μανιώδης (maniōdēs): This means "obsessive" or "maniacal." It captures the intense passion a geek might have for their interest, but doesn't necessarily imply social awkwardness.

* Τρελός (trelós): This means "crazy" or "mad," but can be used playfully. It might be suitable if you want to emphasize the unconventional nature of a geek.

* Φανατικός (fanatikós): This means "fanatic" and highlights the fervent dedication a geek has to their hobby.

* Ξενόφερτος (xenófertos): This translates to "foreign" or "strange" and might be fitting if you want to imply social outsider status.

Ultimately, the best translation will depend on the context. None perfectly capture all aspects of the English word "geek." You might even need a descriptive phrase rather than a single word.