adj. 25B6; adjective
unreadable writing : ILLEGIBLE, hard to read, indecipherable, unintelligible, scrawled, crabbed.
heavy, unreadable novels : DULL, tedious, boring, uninteresting, dry, wearisome, difficult, heavy.
Nathan's expression was unreadable : INSCRUTABLE, enigmatic, impenetrable, cryptic, mysterious, deadpan, poker-faced.
legible, accessible.