This is the 2305th most frequent Portuguese word.
estão
"Estão" means "are" (third-person plural form of the verb "estar").
Used to indicate an action currently happening (present continuous).
As crianças estão brincando no parque.
The children are playing in the park.
Used in a question to ask about someone's current state (present indicative).
Por que estão todos tão preocupados?
Why is everyone so worried?
Used to describe a state being experienced (present indicative).