This is the 5th most frequent Serbian word.
од
"Од" in Serbian means "from" or "since."
The word 'од' is used here to indicate possession or relation, akin to the English 'of'.
Књига је поред стола, од кога је златан оквир.
The book is beside the table of which frame is golden.
In this context, 'од' expresses origin or source, similar to 'from' in English.
Узео сам два јабука од продавнице.
I took two apples from the store.
Here, 'од' is used to indicate the source of knowledge or information, again meaning 'from' in English.