unwritten

/AH0 N R IH1 T AH0 N/
verb
  1. 1

    To erase; to revert to a state where (something) was never written.

  2. 2

    To nullify.

  3. 3

    To deconstruct.

  4. 4

    (computer engineering) To revert to a known state in so that new data can be written.

adjective
  1. 1

    Not written.

  2. 2

    Oral or otherwise communicated without writing.

  3. 3

    Implicit or understood but not formally articulated.

    โ€œIt's an unwritten rule that you lock the gate when you leave the swimming pool.โ€

  4. 4

    Containing no writing; blank.

    โ€œunwritten paperโ€

Source: https://en.wiktionary.org/wiki/unwrite, https://en.wiktionary.org/wiki/unwritten