This is the 949th most frequent Portuguese word.
revelou
"Revelou" means "revealed."
In this sentence, 'revelou' is used in the sense of disclosing or uncovering something previously unknown.
Ela revelou o segredo para sua melhor amiga.
She revealed the secret to her best friend.
Here, 'revelou' means that the process led to the discovery or insight into why something occurred.
O teste revelou a causa do problema.
The test revealed the cause of the problem.
In this context, 'revelou' means to present or show something for the first time.