This is the 4164th most frequent Spanish word.
jeff
"Jeff" is not a Spanish word; it is a common English name.
The word 'Jeff' in this sentence is used as a proper noun, representing the name of a person who is engaged in studying medicine.
Jeff estudia medicina en la universidad.
Jeff studies medicine at the university.
Here, 'Jeff' again serves as a proper noun, specifying the individual that was met and interacted with, giving a personal context to the narrative.
Ayer conocí a Jeff en la cafetería y hablamos de libros.
Yesterday, I met Jeff at the café, and we talked about books.
In this sentence, 'Jeff' functions as a proper noun, referring to a person whose traits or actions are exemplified during a discussion or presentation.