This is the 1762nd most frequent Portuguese word.
falei
"I spoke" or "I talked."
The word 'falei' here is used to indicate that I, in the past, made verbal communication with the teacher in the context provided.
Ontem, eu falei com a professora sobre o projeto.
Yesterday, I spoke to the teacher about the project.
In this case, 'falei' conveys that I expressed verbally the intention regarding an action taking place later.
Eu falei que iria ao mercado hoje mais cedo.
I said that I would go to the market earlier today.
Here, 'falei' is used to reference what I verbally communicated previously, calling for recounting the message faithfully.