unreadable
adjective uk/ʌnˈriː.də.bəl/ us/ʌnˈriː.də.bəl/
（因内容枯燥、晦涩或文笔拙劣）难以阅读的，不适合读的，不值得一读的
too boring, complicated, or badly written to be worth reading
I found James Joyce's "Ulysses" to be totally unreadable. 我发现詹姆斯•乔伊斯的《尤利西斯》难以卒读。
字迹模糊的;无法辨识的
illegible (= impossible to read because not clear or untidy)
completely unreadable handwriting 完全无从辨认的笔迹