This is the 10th most frequent Croatian word.
o
The Croatian word "o" means "about" or "concerning."
Here, 'o' is used as a preposition meaning 'about', indicating the topic of the discussion.
Razgovaramo o filmu koji smo gledali.
We are talking about the movie we watched.
Here, 'o' indicates physical contact, commonly translated as 'against'.
Naslonio se o zid jer je bio umoran.
He leaned against the wall because he was tired.
In this case, 'o' is part of an exclamation expressing an emotional plea, similar to 'Oh' in English.