This is the 15th most frequent Slovenian word.
o
The Slovenian word "o" means "about" or "concerning" in English.
In this sentence, 'o' signifies the theme or subject focus ('about').
Film je pripovedoval o zgodovini Slovenije.
The movie was about the history of Slovenia.
Here, 'o' is used as a preposition meaning 'about'.
Razmišljam o svojih načrtih za prihodnost.
I am thinking about my plans for the future.
The word 'o' again functions as a preposition introducing the topic.