illegible
adjective uk/ɪˈledʒ.ə.bəl/ us/ɪˈledʒ.ə.bəl/
（字迹或印刷）模糊的，难以辨认的
(of writing or print) impossible or almost impossible to read because of being very untidy or not clear
His writing is almost illegible. 他的字迹几乎难以辨认。
Opposite: legible
Synonym: unreadable