What is the meaning of Liber?

The inner bark of plants, next to the wood. It usually contains a large proportion of woody, fibrous cells, and is the part from which the fibre of the plant is obtained, as that of hemp, etc.

A book of public records.

genitive plural of libra

genitive plural of libero

bast (of a tree)

book

free, independent, unrestricted, unchecked, unrestrained, licentious

open (not decided or settled)

unbiased (pertains to lawyers)

exempt, void

a child

book

the inner bark of a tree

first-person singular present passive subjunctive of lībō

free

book

free, at liberty

Source: wiktionary.org