That cannot be read or is not easy to read. / Not sufficiently interesting to be worth reading.

The quality or state of being unreadable.

In an unreadable way.

present participle of unread

Third-person singular simple present indicative form of unread

plural of unread

The property of being impossible to read. / The property of being unfit for reading.

Not having been read. / Not having read; uneducated.

(transitive) To undo the process of reading. / (computing, transitive) To flag (a previously read e-mail or similar message) as not having been read.

(computing) An unread email or instant message.