This is the 992nd most frequent Slovenian word.
vso
The Slovenian word "vso" means "all" or "entire" (feminine singular accusative form).
In this context, 'vso' similarly acts as an adjective, describing the extent to which 'knjigo' should be read.
Rada bi prebrala vso knjigo.
I would like to read the whole book.
Here, 'vso' is used as an adjective agreeing with the feminine singular noun 'juho'.
Skuhala sem vso juho.
I cooked all the soup.
'Vso' modifies the feminine singular noun 'torto', aligning with it in gender and case.