This is the 162nd most frequent Croatian word.
toliko
"So much" or "that much."
The word 'toliko' here is used to express intensity, meaning 'so much', emphasizing the extent of love.
Volim te toliko da ne mogu zamisliti život bez tebe.
I love you so much that I cannot imagine life without you.
In this sentence, 'toliko' refers to quantity and is used to denote 'so many', emphasizing the large number of books.
Nisam vidio toliko knjiga na jednom mjestu.
I haven't seen so many books in one place.
Here 'toliko' is used to illustrate degree, indicating 'so nervous', and it stresses the level of nervousness.