undecipherable 

英汉解释

adj. 难辨认的；破译不出的

同义词

a. indecipherable，unclear，unreadable

参考例句

1. A hopelessly undecipherable jumble of overlapping names.
一大团无法分辨、层叠叠的名字。
2. But someone who has been out there in the floodlights as often as he has can not remain wholly undecipherable.
但是，象他这样一个经常抛头露面的人是不可能一点不被人识破的。
3. Due to dispersion of the signal and other issues the light pulse becomes undecipherable beyond certain distances.
因为讯号散射和其它问题，在超过某些距离时，光脉冲将变得无法辨认。

英英解释

adj.
  1. not easily deciphered

网络释义

undecipherable
不可辨识; 不可译的; 不可译的(密码); 难以辨识;