This is the 3516th most frequent Portuguese word.
perfeitamente
Perfectly.
Here, 'perfeitamente' is used as an adverb to describe the manner in which something was understood, implying complete comprehension.
Eu entendi perfeitamente o que você explicou.
I understood perfectly what you explained.
In this case, 'perfeitamente' modifies the verb 'falar' to highlight the proficiency and accuracy in speaking English.
Ela fala inglês perfeitamente.
She speaks English perfectly.
'Perfeitamente' emphasizes the flawless execution of an action, ensuring all standards or expectations were met during the process.