adjective. Impossible to decipher.

Not decipherable; incapable of being deciphered or interpreted.

adjective. Not decipherable; incapable of being deciphered, explained, or solved.

adjective. Not decipherable; impossible to decode, read, understand or comprehend.

adjective. not easily deciphered

adjective. impossible to determine the meaning of

"The characters are empty stereotypes, who often behave in indecipherable ways, and the dialogue is so awful it made me laugh out loud at least four or five times."

illegible  incomprehensible  uncomprehensible  

catatonic  faraway  foolproof  frictionless  handwritten