unwritten

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

To nullify.

To deconstruct.

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

Not written.

Oral or otherwise communicated without writing.

Implicit or understood but not formally articulated.

“It's an unwritten rule that you lock the gate when you leave the swimming pool.”

Containing no writing; blank.

“unwritten paper”