This is the 12329th most frequent Russian word.
казался
"Seemed" or "appeared."
Here, 'казался' conveys that someone appears to be in a certain state based on observation.
Он казался счастливым.
He seemed happy.
In this sentence, 'казалась' is used to indicate an impression or external assumption about someone's demeanor.
Она казалась более уверенной на сцене.
She seemed more confident on stage.
'Казалось' in this example expresses how an initial perception or belief about a situation is described.