unintelligible

adj

1. not clearly understood or expressed

Synonym: opaque

2. poorly articulated or enunciated, or drowned by noise

e.g. unintelligible speech

1. 难以理解的；晦涩难懂的
Unintelligible language is impossible to understand, for example because it is not written or pronounced clearly, or because its meaning is confused or complicated.

e.g. He muttered something unintelligible...
他嘴里不知咕哝了几句什么。
e.g. I did my best to join in, but the conversation was largely unintelligible.
我努力想插上话，可是大部分谈话内容我都听不懂。

1. unintelligible

1. 难理解的：uninjured 未受损伤的 | unintelligible 难理解的 | unintentional 无意的

2. unintelligible

2. 难解的：unintelligent 缺乏才智的 | unintelligible 难解的 | unintelligibly 难以理解地

3. 不可懂串音：可懂串音 intelligible crosstalk | 不可懂串音 unintelligible | 信串比;串音防卫度 signal to crosstalk ratio

4. 难懂的/令人困扰的：finer points细节 | unintelligible难懂的/令人困扰的 | take comfort令人欣慰