ppl. a. [UN-1 8.] Not deciphered or made out.

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a. 1668.  Davenant, Philos. Disquisition, Wks. (1673), 326. She steals to Natures Closet, and from thence, Brings nought but undecypher’d Characters.

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1755.  Young, Centaur, ii. Wks. 1757, IV. 153. Does this yet unconstrued, undecyphered creature consider himself as an immortal being?

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1827.  Hood, Hero & Leander, lvii. As one, who pores on undecypher’d books, Strains vain surmise.

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1897.  P. Warung, Tales Old Régime, 231. The fear that … any written message from their friend … might remain undeciphered.

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