When something is not legible, it means that it cannot be read or understood easily or clearly. Synonyms for the term "not legible" are numerous, and they include indecipherable, illegible, unreadable, incomprehensible, undecipherable, unclear, unintelligible, and inscrutable. Indecipherable suggests that the writing or text is so muddled that it cannot be figured out, while illegible implies that the text is so poorly written that it is impossible to comprehend. Unreadable suggests that the text is too small, too blurry, or too obscured to be read effectively. Incomprehensible implies that the language or writing is so complex or confusing that it defies interpretation. Meanwhile, undecipherable implies that the writing is so foreign or unfamiliar that it cannot be interpreted or translated.