How to Say "to plagiarize" in Spanish
The Spanish word for “to plagiarize” is “fusilar” — C1 level.

Examples
Ese autor fusiló todo el capítulo de un libro francés.
That author ripped off the entire chapter from a French book.
No puedes fusilar el diseño de mi página web.
You can't just copy the design of my website.
Se nota que has fusilado las respuestas del examen.
It's obvious you've copied the answers for the exam.
Direct Object
When 'fusilar' means to copy, you don't need a special word before the thing you are copying. Just 'fusilar algo' (to rip something off).
Register awareness
Mistake: “Using 'fusilar' in a formal academic appeal.”
Correction: In formal settings like a university hearing, use 'plagiarizar' or 'cometer plagio'. 'Fusilar' is too informal for official documents.
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