Definition of "undecipherable" []

• Not easily deciphered; difficult to read (adjective)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "I stole a glance at Patch, to see his reaction to what I’d just done, but his eyes were on the poker game, his expression undecipherable."
• "The Oriental words and phrases are, in several instances, very incorrectly printed; but whether the fault rests with the colonel's "undecipherable" MS., or the correctors of the press, it is not for us to decide."
• "He didn’t use any unnecessary words, and his expression was undecipherable."