This is the 28th most frequent Serbian word.
била
"Била" in Serbian can mean "was" (feminine past tense of "to be") or "pulse" depending on context.
In this sentence, 'била' is used as the feminine singular past tense of the verb 'biti,' meaning 'to be.' It indicates a past state of being.
Она је била на путу до школе.
She was on her way to school.
'Била' here is part of an introductory construction indicating the existence of something in the past. It helps set the background for the noun 'књига' (book).
Била је једна занимљива књига на полици.
There was an interesting book on the shelf.
The word 'била' here reflects the speaker's emotional state in the past, emphasizing their personal experience during that time.