undecipherable

adj.=indecipherable

无法解读的；无法辨认的；

形容词；

1. The ancient script on the wall is undecipherable to modern scholars.
对于现代学者来说，墙上的古代文字无法解读。
2. The handwriting on the letter was so messy that it was undecipherable.
信上的字迹非常潦草，难以辨认。