This is the 123rd most frequent Afrikaans word.
op
"Op" in Afrikaans means "on" or "up" in English.
Here, 'op' indicates location (onto the mountain).
Ek klim op die berg.
I climb onto the mountain.
In this sentence, 'op' means 'on,' referring to the placement of the book.
Die boek lê op die tafel.
The book lies on the table.
Here, 'op' is a part of 'opgewonde,' which means 'excited,' showing its use in word formation.