Unbacked a. : Never mounted by a rider; unbroken.

Unbacked a. : Not supported or encouraged; not countenanced; unaided.

Example:
Will inflation rise from printing so much Unbacked money?

Taxonomy
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Defination from the web:
unbacked from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... Learn more about "unbacked" and related topics at Britannica.com. Pronunciation Symbols. Share this entry: Link to this page: Cite this page: Products ...