Douglas Harper's Etymology Dictionary
Wiktionary
a. Not easily deciphered; difficult to read.
WordNet
adj. not easily deciphered; "indecipherable handwriting" [syn: indecipherable, unclear, unreadable]
Usage examples of "undecipherable".
On the pommel was struck a single complex glyphic which the Prince with his sketchy knowledge of such things, found undecipherable.
This thing, which seemed instinct with a fearsome and unnatural malignancy, was of a somewhat bloated corpulence, and squatted evilly on a rectangular block or pedestal covered with undecipherable characters.
Carefully unrolling the manuscript, Reeves was amazed to find two sheets of the filmy paper covered with strange, undecipherable marks.
At night, the darkness is punctuated by howls and explosions, the roar of undecipherable Cantonese fury, writhing inferno, reeling horses, a world gone crazy.
Then they took off again, their flight choreographed, it seemed, in a complex, undecipherable pattern.
Purity of expression is valued over clarity, with the result that much Naked Purple prose and speech is almost undecipherable.
He tried to speak out, but only undecipherable blabber came past his trembling lips.