How to Say "bookworm" in Spanish
The Spanish word for “bookworm” is “matado” — C1 level.
English → SpanishC1
Adjective/NounC1slang
a person who studies excessively

Examples
No salgas con él; es un matado que solo piensa en estudiar.
Don't go out with him; he's a bookworm who only thinks about studying.
Dejamos de ser amigos porque se volvió un matado y no tenía tiempo para fiestas.
We stopped being friends because he became a grind and had no time for parties.
Used as a Noun
In this specific context, 'matado' often acts as a noun to refer to the person itself ('un matado'), rather than just describing them.
Related Translations
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