unreadable

/ʌnˈriːdəbəl/
adjective
  1. Impossible or very difficult to read because the writing or print is not clear.
    • The old book had faded ink, making some pages unreadable.
    • She tried to read the note, but the water damage had made it unreadable.
    • The doctor's handwriting was so messy it was completely unreadable.
  2. Too boring, poorly written, or confusing to be worth reading.
    • His essay was full of jargon and run-on sentences, making it nearly unreadable.
    • I found the novel's long descriptions unreadable and put it down after ten pages.
    • The technical manual was unreadable for anyone without a degree in engineering.
  3. (of a person's expression or face) impossible to interpret; showing no emotion or clear meaning.
    • Her face remained unreadable as she listened to the shocking news.
    • He stared at me with an unreadable look, and I couldn't tell if he was angry or sad.
    • The detective's expression was unreadable, giving no hint of what he was thinking.
  4. (of computer data or a storage medium) impossible for a computer to read or access.
    • The USB drive was damaged, and all the files became unreadable.
    • The old floppy disk is unreadable on modern computers.
    • The corrupted hard drive left many important documents unreadable.