unbacked

/AH0 N B AE0 K T/
adjective
  1. 1

    Having no back.

    โ€œan unbacked benchโ€

  2. 2

    Not supported or backed up (by someone or something).

  3. 3

    Having no (or few) backers.

    โ€œa largely unbacked fundraising projectโ€

  4. 4

    Of an animal: never having been ridden or not accustomed to being ridden; not (currently) being ridden.

  5. 5

    (holography) (of a plate) Not having an antihalation backing.

Source: https://en.wiktionary.org/wiki/unbacked