The term "unreadably" denotes that something is not easy or impossible to read. There are several synonyms that can be used to express the same meaning as "unreadably". Some of these synonyms include indigestible, incomprehensible, illegible, unintelligible, confusing and unfathomable. Indigestible implies something that is difficult to understand due to its complexity or indecipherable nature. Incomprehensible suggests something that is beyond understanding. Illegible denotes something that is not easily legible or readable. Unintelligible suggests something that is difficult to comprehend or understand due to its unclear presentation or language usage. Confusing implies something that is difficult to comprehend or make sense of, and unfathomable denotes something that is impossible to understand or comprehend.