unwritten

Words with a similar base: unwritten

[unwritten.a.01] as in: based on custom rather than documentation; ; - J.L.T.C.Spence

ancient that they well might have had their unwritten origins in Aurignacian times

[oral.s.01] as in: using speech rather than writing

[ad-lib.s.02] as in: said or done without having been planned or written in advance

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