A word for “barren” in the Gnomish Lexicon of the 1910s, a combination of G. giol “fecund” with the negative prefix G. il- (GL/50).
Gnomish
gwivrin
adjective. barren
uivrin
adjective. barren
ilgiol
adjective. barren
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
An adjective appearing as G. uivrin “barren” in the Gnomish Lexicon of the 1910s glossed, the negated form of G. ivrin “fertile” (GL/46, 74). It had a variant form G. gwivrin “barren” where with the “ui- being replaced by analogy” (GL/46).
Neo-Sindarin: I would update this word to ᴺS. aliavren “barren” for purposes of Neo-Sindarin, based on the updated word ᴺS. iavren “fertile”.