This is the 9141st most frequent Russian word.
святая
"Святая" means "saint" (feminine) in English.
The word 'святая' is used as an adjective here, describing a girl characterized by her pious or saintly behavior.
Она была известна как святая девушка, помогавшая всем.
She was known as a saintly girl who helped everyone.
Here, 'святая' is used as a noun meaning 'a saint', referring to a religious figure.
Легенда гласит, что святая обитала в этом старом монастыре.
The legend says that a saint resided in this old monastery.
In this sentence, 'святая' is part of the phrase 'святая правда', where 'святая' (adjective) means 'holy' or 'sacred', modifying 'truth'.