In the context of "book":
* Liber: This is the Latin word for book, and it's the root of many English words related to books, such as "library" and "librarian."
In the context of "free":
* Liber: This meaning stems from the idea of being free from constraints or limitations, which could be related to the freedom of thought or expression often associated with books.
* Liberate: This word means to set free.
* Liberty: This word means freedom.
Therefore, the meaning of "liber" depends on the specific word it's part of.